Major Operation

INVADER

Far out on the Galactic Rim, where star systems were widely scattered and the darkness nearly absolute, the tremendous structure which was Sector Twelve General Hospital hung in space. Inside its three hundred and eighty-four levels were reproduced the environments of all the intelligent life-forms known to the Galactic Federation, a biological spectrum ranging from the ultra frigid methane species through the more normal oxygen- and chlorine-breathing types up to the exotic beings who existed by the direct conversion of hard radiation. In addition to the patients, whose number and physiological classification was a constant variable, there was a medical and maintenance staff who were composed of sixty-odd differing life-forms with sixty different sets of mannerisms, body odors and ways of looking at life.

The staff of Sector General was an extremely able, dedicated, but not always serious group of people who were fanatically tolerant of all forms of intelligent life-had this not been so they could never have served in such a multienvironment hospital in the first place. They prided themselves that no case was too big, too small or too hopeless, and their facilities and professional reputation were second to none. It was unthinkable that one of their number should be guilty of nearly killing a patient through sheer carelessness.

“Obviously the thought isn’t unthinkable,” O’Mara, the Chief Psychologist, said dryly. “I’m thinking it, reluctantly, and you are also thinking it — if only momentarily. Far worse, Mannon himself is convinced of his own guilt. This leaves me with no choice but to—”

“No!” said Conway, strong emotion overriding his usual respect for authority. “Mannon is one of the best Seniors we have — you know that!

He wouldn’t … I mean, he isn’t the type to … He’s …

“A good friend of yours,” O’Mara finished for him, smiling. When Conway did not reply he went on, “My liking for Mannon may not equal yours, but my professional knowledge of him is much more detailed and objective. So much so that two days ago I would not have believed him capable of such a thing. Now, dammit, uncharacteristic behavior bothers me …

Conway could understand that. As Chief Psychologist, O’Mara’s prime concern was the smooth and efficient running of the hospital’s medical staff, but keeping so many different and potentially antagonistic life-forms working in harmony was a big job whose limits, like those of O’Mara’s authority, were difficult to define. Given even the highest qualities of tolerance and mutual respect in its personnel, there were still occasions when friction occurred.

Potentially dangerous situations arose through ignorance or misunderstanding, or a being could develop a xenophobic neurosis which might affect its efficiency, mental stability, or both. An Earth-human doctor, for instance, who had a subconscious fear of spiders would not be able to bring to bear on one of the insectile Cinrusskin patients the proper degree of clinical detachment necessary for its treatment. It was O’Mara’s duty to detect and eradicate such trouble, or to remove the potentially troublesome individuals. This guarding against wrong, unhealthy or intolerant thinking was a duty which he performed with such zeal that Conway had heard him likened to a latter-day Torquemada.

Now it looked as if this paragon of psychologists had been something less than alert. In psychology there were no effects without prior cause and O’Mara must now be thinking that he had missed some small but vital warning signal — a slightly uncharacteristic word or expression or display of temper, perhaps — which should have warned him of trouble developing for Senior Physician Mannon.

The psychologist sat back and fixed Conway with a pair of gray eyes which saw so much and which opened into a mind so keenly analytical that together they gave O’Mara what amounted to a telepathic faculty He said, “No doubt you are thinking that I have lost my grip. You feel sure that Mannon’s trouble is basically psychological and that there is an explanation other than negligence for what happened. You may decide that the recent death of his dog has caused him to go to pieces from sheer grief, and other ideas of an equally uncomplicated and ridiculous nature will occur to you. In my opinion, however, any time spent investigating the psychological aspects of this business will be completely wasted. Doctor Mannon has been subjected to the most exhaustive tests. He is physically sound and as sane as we are. As sane as I am any …

“Thank you,” said Conway.

“I keep telling you, Doctor,” O’Mara said sourly, “my job here is to shrink heads, not swell them. Your assignment, if we can call it that, is strictly unofficial. Since there is no excuse for Mannon’s error so far as health and psycho profile are concerned I want you to look for some other reason-some outside influence, perhaps, of which the Doctor is unaware. Doctor Prilicla observed the incident in question and may be able to help you.

“You have a peculiar mind, Doctor,” O’Mara concluded, rising from his seat, “and an odd way of looking at problems. We don’t want to lose Doctor Mannon, but if you do get him out of trouble the surprise will probably kill me. I mention this so that you will have an added incentive …

Conway left the office, fuming slightly. O’Mara was always flinging his allegedly peculiar mind in his face when the simple truth was that he had been so shy when he had first joined the hospital, especially with nurses of his own species, that he had felt more comfortable in extraterrestrial company. He was no longer shy, but still he numbered more friends among the weird and wonderful denizens of Traltha, Illensa and a score of other systems than beings of his own species. This might be peculiar, Conway admitted, but to a doctor living in a multi-environment hospital it was also a distinct advantage.

Outside in the corridor Conway contacted Prilicla in the other’s ward, found that the little empath was free and arranged a meeting for as soon as possible on the Forty-sixth Level, which was where the Hudlar operating theater was situated. Then he devoted a part of his mind to the problem of Mannon while the rest of it guided him toward Forty-six and kept him from being trampled to death en route.

His Senior Physician’s armband automatically cleared the way so far as nurses and subordinate grades of doctors were concerned, but there were continual encounters with the lordly and absentminded Diagnosticians who plowed their way through everyone and everything regardless, or with junior members of the staff who happened to belong to a more massive species. Tralthans of physiological classification FGLI-warm-blooded oxygen breathers resembling a sort of low-slung, six-legged elephant. Or the Kelgian DBLFs who were giant, silver-furred caterpillars who hooted like a siren when they were jostled whether they were outranked or not, or the crab-like ELNTs from Melf LV …

The majority of the intelligent races in the Federation were oxygen breathers even though their physiological classifications varied enormously, but a much greater hazard to navigation on foot was the entity traversing a foreign level in protective armor. The protection required by a TLTU doctor, who breathed superheated steam and whose gravity and pressure requirements were three times those of the oxygen levels, was a great, clanking juggernaut which was to be avoided at all costs.

At the next intersection lock he donned a lightweight suit and let himself into the yellow, foggy world of the chlorine-breathing Illensans. Here the corridors were crowded with the spiny, membranous and unadorned denizens of Illensa while it was the Tralthans, Kelgians and Earth humans like himself who wore, or in some cases drove, protective armor. The next leg of his journey took him through the vast tank where the thirty-foot long, water-breathing entities from Chalderescol II swam ponderously through their warm, green world. The same suit served him here and, while the traffic was less dense, he was slowed down considerably through having to swim instead of walk. Despite this he was on the Forty-sixth Level observation gallery, his suit still streaming Chalder water, just fifteen minutes after leaving O’Mara’s office, and Prilicla arrived close behind him.

“Good morning, friend Conway,” said the little empath as it swung itself deftly onto the ceiling and hung by six fragile, sucker-tipped legs. The musical trills and clicks of its Cinrusskin speech were received by Conway’s Translator pack, relayed down to the tremendous computer at the center of the hospital and transmitted back to his earpiece as flat, emotionless English. Trembling slightly, the Cinrusskin went on, “I feel you needing help, Doctor.”

“Yes indeed,” said Conway, his words going through the same process of Translation and reaching Prilicla as equally toneless Cinrusskin. “It’s about Mannon. There was no time to give details when I called you …

“No need, friend Conway,” said Prilicla. “On the Mannon incident the grapevine is more than usually efficient. You want to know what I saw and felt, of course.

“If you don’t mind,” said Conway apologetically.

Prilicla said that it didn’t mind. But the Cinrusskin was, in addition to being the nicest entity in the whole hospital, its greatest liar.

Of physiological classification GLNO-insectile, exoskeletal with six pipe stem legs and a pair of iridescent and not quite atrophied wings, and possessing a highly developed empathic faculty, only on Cinruss with its one-eighth Earth gravity could a race of insects have grown to such dimensions and in time developed intelligence and a high civilization. But in Sector General Prilicla was in deadly danger for most of its working day. It had to wear gravity nullification devices everywhere outside its quarters because the gravity pull which most beings considered normal would instantly have crushed it flat, and when Prilicla held a conversation with anyone it swung itself out of reach of any thoughtless movement of arm or tentacle which would have caved in its fragile body or snapped off a leg. While accompanying anyone on rounds it usually kept pace with them along the corridor walls or ceiling so as to avoid the same fate.

Not that anyone would have wanted to hurt Prilicla in any way-it was too well liked for that. Prilicla’s empathic faculty saw to it that the little being always said and did the right thing to people-being an emotion-sensitive to do otherwise would mean that the feelings of anger or sorrow which its thoughtless action caused would bounce back and figuratively smack it in the face. So the little empath was forced constantly to lie and to always be kind and considerate in order to make the emotional radiation of the people around it as pleasant for itself as possible.

Except when its professional duties exposed it to pain and violent emotion in a patient, or it wanted to help a friend.

Just before Prilicla began its report Conway said, “I’m not sure myself what exactly it is I’m looking for, Doctor. But if you can remember anything unusual about Mannon’s actions or emotions, or those of his staff …

With its fragile body trembling with the memory of the emotional gale which had emanated from the now empty Hudlar theater two days ago, Prilicla set the scene as it had been at the beginning of the operation. The little GLNO had not taken the Hudlar physiology tape and so had not been able to view the proceedings with any degree of involvement with the patient’s condition, and the patient itself was anesthetized and scarcely radiating at all. Mannon and his staff had been concentrating on their duties with only a small part of their minds free to think or emote about anything else. And then Senior Physician Mannon had his … accident. In actual fact it was five separate and distinct accidents.

Prilicla’s body began to quiver violently and Conway said, “I … I’m sorry.”

“I know you are,” said the empath, and resumed its report.

The patient had been partially decompressed so that the operative field could be worked more effectively. There was some danger in this considering the Hudlar pulse rate and blood pressure, but Mannon himself had evolved this procedure and so was best able to weigh the risks. Since the patient was decompressed he had had to work quickly, and at first everything seemed to be going well. He had opened a flap of the flexible armor-plating which the Hudlars used for skin and had controlled the subcutaneous bleeding when the first mistake occurred, followed in quick succession by two more. Prilicla could not tell by observation that they were mistakes, even though there was considerable bleeding-it was Mannon’s emotional reactions, some of the most violent the empath had ever experienced, which told it that the surgeon had committed a serious and stupid blunder.

There were longer intervals between the two others which followed- Mannon’s work had slowed drastically, his technique resembling the first fumblings of a student rather than that of one of the most skillful surgeons in the hospital. He had become so slow that curative surgery was impossible, and he had barely time to withdraw and restore pressure before the patient’s condition deteriorated beyond the point of no return.

It was very distressing,” Prilicla said, still trembling violently. “He wanted to work quickly, but the earlier mistakes had wrecked his self confidence. He was thinking twice about doing even the simplest things, things which a surgeon of his experience would do automatically, without thinking.”

Conway was silent for a moment, thinking about the horrible situation Mannon had been in. Then he said, “Was there anything else unusual about his feelings? Or those of the theater staff?”

Prilicla hesitated, then said, “It is difficult to isolate subtle nuances of emotion when the source is emoting so … so violently. But I received the impression of … the effect is hard to describe … of something like a faint emotional echo of irregular duration …”

“Probably the Hudlar tape,” said Conway. “It’s not the first time a physiology tape gave me mental double vision.”

“That might possibly be the case,” said Prilicla. Which, in a being who was invariably and enthusiastically in agreement with whatever was said to it, was as close as the empath could come to a negative reply. Conway began to feel that he might be getting onto something important.

“How about the others?”

“Two of them,” said Prilicla, “were radiating the shock-worry-fear combination indicative of a mildly traumatic experience in the recent past. I was in the gallery when both incidents occurred, and one of them gave me quite a jolt …

One of the nurses had almost had an accident while lifting a tray of instruments. One of them, a long, heavy, Hudlar Type Six scalpel used for opening the incredibly tough skin of that species, had slipped off the tray for some reason. Even a small punctured or incised wound was a very serious matter for a Kelgian, so that the Kelgian nurse had a bad fright when it saw that vicious blade dropping toward its unprotected side. But somehow it had struck in such a way-it was difficult to know how, considering its shape and lack of balance-that it had not penetrated the skin or even damaged the fur. The Kelgian had been relieved and thankful for its good fortune, but still a little disturbed.

“I can imagine,” said Conway. “Probably the Charge Nurse read the riot act. Minor errors become major crimes where theater staff are concerned …

Prilicla’s legs began to tremble again, a sign that it was nerving itself for the effort of being slightly disagreeable. It said, “The entity in question was the Charge Nurse. That was why, when the other nurse goofed on an instrument count-there was one too many or too few-the ticking off was relatively mild. And during both incidents I detected the echo effect radiated by Mannon, although in these cases the echo was from the respective nurses.

“We may have something there!” said Conway excitedly. “Did the nurses have any physical contact with Mannon?”

“They were assisting him,” said Prilicla, “and they were all wearing protective suits. I don’t see how any form of parasitic life or bacteria could have passed between them, if that is the idea which is making you feel so excited and hopeful just now. I am very sorry, friend Conway, but this echo effect, while peculiar, does not seem to me to be important.”

“It’s something they had in common,” said Conway.

“Yes,” Prilicla said, “but the something did not have self identity, it was not an individual. Just a very faint emotional echo of the feelings of the people concerned.”

“Even so,” said Conway.

Three people had made mistakes or had had accidents in this theater two days ago, all of whom had radiated an odd emotional echo which Prilicla did not consider important. The presence of an accident-prone Conway ruled out because O’Mara’s screening methods were too efficient in that respect. But suppose Prilicla was wrong and something had got in the theater or into the hospital, some form of life which was difficult to detect and outside their present experience. It was well known that when odd things happened in Sector General the reasons very often were found outside the hospital. At the moment, however, he hadn’t enough evidence to form even a vague theory and the first job should be to gather some — even though he might not recognize it if he tripped over it with both feet.

“I’m hungry and it’s high time we talked to the man himself,” said Conway suddenly. “Let’s find him and invite him to lunch.”

The dining hall for the oxygen-breathing Medical and Maintenance staff occupied one complete level, and at one time it had been sectioned off into physiological types with low dividing ropes. But this had not worked out too well because the diners very often wanted to talk shop with other species colleagues or they found that there were no vacant places in their own enclosure and space going to waste in that of another life-form. So it was no surprise when they arrived to find that they had the choice of sitting at an enormous Tralthan table with benches which were a shade too far from the table’s edge and one in the Melfan section which was cozier but whose chairs resembled surrealistic wastepaper baskets. They insinuated themselves into three of the latter and began the usual preliminaries to ordering.

“I’m just myself today,” said Prilicla in answer to Conway’s question. “The usual, if you please.”

Conway dialed for the usual, which was a triple helping of Earth type spaghetti, then looked at Mannon.

“I’ve an FROB and an MSVK beastie riding me,” the other Senior said gruffly. “Hudlars aren’t persnickity about food, but those blasted MSVKs are offended by anything which doesn’t look like birdseed! Just get me something nutritious, but don’t tell me what it is and put it in about three sandwiches so’s I won’t see what it is …”

While they were waiting for the food to arrive Mannon spoke quietly, the normality of his tone belied by the fact that his emotional radiation was making Prilicla shake like a leaf. He said, “The grapevine has it that you two are trying to get me out of this trouble I’m in. It’s nice of you, but you’re wasting your time.

“We don’t think so and neither does O’Mara,” said Conway, shading the truth considerably. “O’Mara gives you a clean bill of mental and physical health, and he said that your behavior was most uncharacteristic. There must be some explanation, some environmental influence, perhaps, or something whose presence or absence would make you behave, if only momentarily, in an uncharacteristic fashion …

Conway outlined what little they knew to date, trying to sound more hopeful than he really felt, but Mannon was no fool.

“I don’t know whether to feel grateful for your efforts or concerned for your respective mental well-beings,” Mannon said when he had finished. “These peculiar and rather vague mental effects are … are … at the risk of offending Daddy-longlegs here I would suggest that any peculiarities there are lie in your own minds-your attempts to find excuses for me are becoming ridiculous!”

“Now you’re telling me I have a peculiar mind,” said Conway.

Mannon laughed quietly, but Prilicla was trembling worse than ever. “A circumstance, person or thing,” Conway repeated, “whose presence or absence might effect your- “Ye Gods!” Mannon burst out. “You’re not thinking of the dog!” Conway had been thinking about the dog, but he was too much of

a moral coward to admit it right then. Instead he said, “Were you thinking about it during that op, Doctor?”

“No!” said Mannon.

There was a long, awkward silence after that, during which the service panels slid open and their orders rose into view. It was Mannon who spoke first.

“I liked that dog,” he said carefully, “when I was myself, that is. But for the past four years I’ve had to carry MSVK and LSVO tapes permanently in connection with my teaching duties, and recently I’ve needed the Hudlar and Melfan tapes for a project Thornnastor invited me to join. They were in permanent occupation as well. With my brain thinking that it was five different people, five very different people … Well, you know how it is …”

Conway and Prilicla knew how it was only too well.

The Hospital was equipped to treat every known form of intelligent life, but no single person could hold in his brain even a fraction of the physiological data necessary for this purpose. Surgical dexterity was a matter of ability and training, but the complete physiological knowledge of any patient was furnished by means of an Educator Tape, which was simply the brain record of some great medical genius belonging to the same or a similar species to that of the patient being treated. If an Earth human doctor had to treat a Kelgian patient he took a DBLF physiology tape until treatment was completed, after which it was erased. The sole exceptions to this rule were Senior Physicians with teaching duties and the Diagnosticians.

A Diagnostician was one of the elite, a being whose mind was considered stable enough to retain permanently six, seven or even ten physiology tapes simultaneously. To their data-crammed minds was given the job of original research in xenological medicine and the treatment of new diseases in hitherto unknown life-forms.

But the tapes did not impart only physiological data, the complete memory and personality of the entity who had possessed that knowledge was transferred as well. In effect a Diagnostician subjected himself or itself voluntarily to the most drastic form of schizophrenia. The entities apparently sharing one’s mind could be unpleasant, aggressive individuals- geniuses were rarely charming people — with all sorts of peeves and phobias. These did not become apparent only at mealtimes. The worst period was when the possessor of the tapes was relaxing prior to sleeping.

Alien nightmares were really nightmarish and alien sexual fantasies and wish-fulfillment dreams were enough to make the person concerned wish, if he were capable of wishing coherently for anything, that he was dead.

… Within the space of a few minutes,” Mannon continued, “she would change from being a ferocious, hairy beast intent on tearing out my belly feathers to a brainless bundle of fur which would get squashed by one of my six feet if it didn’t get to blazes out of the way, to a perfectly ordinary dog wanting to play. It wasn’t fair to the mutt, you know. She was a very old and confused dog toward the end, and I’m more glad than sorry that she died.

“And now let’s talk and emote about some other subject,” Mannon ended briskly. “Otherwise we will completely ruin Prilicla’s lunch …

He did just that for the remainder of the meal, discussing with apparent relish a juicy piece of gossip originating in the SNLU section of the methane wards. How anything of a scandalous nature could occur between two intelligent crystalline life-forms living at minus one hundred and fifty degrees Centigrade was something which puzzled Conway, or for that matter why their moral shortcomings were of such interest to a warm-blooded oxygen-breather. Unless this was one of the reasons why Senior Physician Mannon was so far on the way to becoming a Diagnostician himself.

Or had been.

If Mannon was assisting Thornnastor, the Diagnostician-in-Charge of Pathology (and as such the hospital’s senior Diagnostician) in one of that august being’s projects, then Mannon had to be in good physical and mental shape-Diagnosticians were terribly choosy about their assistants. And everything the Chief Psychologist had told him pointed the same way. But then what had got into Mannon two days ago to make him behave as he had?

As the others talked Conway began to realize that the sort of evidence he needed might be difficult to gather. The questions he had to ask would require tact and some sort of theory to explain his line of investigation. His mind was still miles away when Mannon and Prilicla began rising to go. As they were leaving the table Conway moved closer to Prilicla and asked softly, “Any echoes, Doctor?”

“Nothing,” said Prilicla, “nothing at all.”

Within seconds their places at the table were taken by three Kelgians who draped their long, silvery, caterpillar bodies over the backs of the ELNT chairs so that their forward manipulators hung over the table at a comfortable distance for eating. One of the three was Naydrad, the Charge Nurse on Mannon’s theater staff. Conway excused himself to his friends and returned quickly to the table.

When he had finished talking it was Naydrad who spoke first. It said, “We would like to help, sir, but this is an unusual request. It involves, at very least, the wholesale betrayal of confidence …

“We don’t want names,” said Conway urgently. “The mistakes are required for statistical purposes only and no disciplinary action will be taken. This investigation is unofficial, an idea of my own. Its only purpose is to help Doctor Mannon.”

They were all keen to help their Chief, naturally, and Conway went on, “To summarize, if we accept that Senior Physician Mannon is incapable of gross professional misconduct-which we all do-then we must assume that his error was caused by an outside influence. Since there is strong evidence that the Doctor was mentally stable and free from all disease or physical malfunction it follows that we are looking for an outside influence-or more accurately, indications of the presence of an outside influence-which may be nonphysical.

“Mistakes by a person in authority are more noticeable, and serious, than those of a subordinate,” Conway went on, “but if these errors are being caused by an outside agency they should not be confined only to senior staff, and it is here that we need data. There are bound to be mistakes, especially among trainee staff-we all realize this. What we must know is whether there has been an overall or local increase in the number of these minor errors and, if so, exactly where and when they occurred.”

“Is this matter to be kept confidential?” one of the Kelgians asked.

Conway nearly choked at the idea of anything being kept confidential in this place, but the sarcasm was, fortunately, filtered out of his tone by the process of Translation.

“The more people gathering data on this the better,” he said. “Just use your discretion …

A few minutes later he was at another table saying much the same thing, then another and another. He would be late back to his wards today, but fortunately he had a couple of very good assistants-the type who just loved it when they had a chance to show how well they could do without him.

During the remainder of the day there was no great response, nor had he expected any, but on the second day nursing staff of all shapes and species began approaching him with elaborate secrecy to tell of incidents which invariably had happened to a third party. Conway noted times and places carefully while showing no curiosity whatever regarding the identities of the persons concerned. Then on the morning of the third day Mannon sought him out during his rounds.

“You’re really working at this thing, aren’t you, Conway,” Mannon said harshly, then added, “I’m grateful. Loyalty is nice even when it’s misplaced. But I wish you would stop. You’re heading for serious trouble.”

Conway said, “You’re the one in trouble, Doctor, not me.

“That’s what you think,” said Mannon gruffly. “I’ve just come from O’Mara’s office. He wants to see you. Forthwith.”

A few minutes later Conway was being waved into the inner sanctum by one of O’Mara’s assistants, who was trying hard to warn him of impending doom with his eyebrows while commiserating with him by turning down the corners of his mouth. The combination of expressions looked so ridiculous that Conway found himself inside before he realized it, facing a very angry O’Mara with what must have been a stupid grin on his face.

The psychologist stabbed a finger in the direction of the least comfortable chair and shouted, “What the blazes do you mean by infesting the hospital with a disembodied intelligence?”

“What …?” began Conway.

Are you trying to make a fool of yourself?” O’Mara stormed on, disregarding him. “Or make a fool out of me? Don’t interrupt! Granted you’re the youngest Senior in the place and your colleagues-none of whom specialize in applied psychology, let me add-think highly of you. But such idiotic and irresponsible behavior is worthy only of a patient in the psychiatric wards!

“Junior staff discipline is going to pot, thanks to you,” O’Mara went on, a little more quietly. “It is now becoming the done thing to make mistakes! Practically every Charge Nurse in the place is screaming for me-me! — to get rid of the thing! All you did was invent this invisible, undetectable, insubstantial monster-apparently the job of getting rid of it is the responsibility of the Chief Psychologist!”

O’Mara paused to catch his breath, and when he continued his tone had become quiet and almost polite. He said, “And don’t think that you are fooling anyone. Boiled down to its simplest terms, you are hoping that if enough other mistakes are made your friend’s will pass relatively unnoticed. And stop opening and closing your mouth-your turn to talk will come! One of the aspects of this whole situation which really troubles me is that I share responsibility for it in that I gave you an insoluble problem hoping that you might attack it from a new angle-an angle which might give a partial solution, enough to let our friend off the hook. Instead you created a new and perhaps worse problem!

“I may have exaggerated things a little because of excusable annoyance, Doctor,” O’Mara went on quietly, “but the fact remains that you may be in serious trouble over this business. I don’t believe that the nursing staff will deliberately make mistakes-at least, not of the order which would endanger their patients. But any relaxation of standards is dangerous, obviously. Do you begin to see what you’ve been doing, Doctor?”

“Yes, sir,” said Conway.

“I see that you do,” O’Mara said with uncharacteristic mildness. “And now I would like to know why you did it. Well, Doctor?”

Conway took his time about answering. This was not the first time he had left the Chief Psychologist’s office with his ego singed around the edges, but this time it looked serious. The generally held opinion was that when O’Mara was not unduly concerned over, or in some cases when he actually liked an individual, the psychologist felt able to relax with them and be his bad-tempered, obnoxious self, but when O’Mara became quiet and polite and not at all sarcastic, when he began treating a person as a patient rather than a colleague in other words, that person was in trouble up to his or its neck.

Finally, Conway said, “At first it was simply a story to explain why I was being so nosy, sir. Nurses don’t tell tales and it might have looked as if that was what I wanted them to do. All I did was suggest that as Doctor Mannon was in all respects fit, outside physical agencies such as e-t bacteria or parasites and the like were ruled out because of the thoroughness of our aseptic procedures. You, sir, had already reassured us regarding his mental condition. I postulated an … an outside, nonmaterial cause which might or might not be consciously directed.

“I haven’t anything so definite as a theory about it,” Conway went on quickly. “Nor did I mention disembodied intelligences to anyone, but something odd happened in that theater, and not only during the time of Mannon’s operation …

He described the echo effect Prilicla had detected while monitoring Mannon’s emotional radiation, and the similar effect when Naydrad had had the accident with the knife. There was also the later incident of the Melfan intern whose sprayer wouldn’t spray-their mandibles weren’t suited to surgical gloves so that they painted them with plastic before an op. When the intern had tried to use the sprayer it oozed what the Melfan described as metallic porridge. Later the sprayer in question could not be found. Perhaps it had never existed. And there were other peculiar incidents. Mistakes which seemed a little too simple for trained staff to make-errors in instrument counts, dropping things, and all seeming to involve a certain amount of temporary mental confusion and perhaps outright hallucination.

So far there has not been enough to make a statistically meaningful sample,” Conway went on, “but they are enough to make me curious. I’d give you their names if I wasn’t sworn to keep them confidential, because I think you would be interested in the way they describe some of these incidents.

“Possibly, Doctor,” said O’Mara coldly. “On the other hand I might not want to lend my professional support to a figment of your imagination by investigating such trivia. As for the near-accidents with scalpels and the other mistakes, it is my opinion that some people are lucky, others a little bit stupid at times, while others are fond of pulling other peoples’ legs. Well, Doctor?”

Conway took a firmer grip on the arms of his chair and said doggedly, “The dropped scalpel was an FROB Type Six, a very heavy, unbalanced instrument. Even if it had struck handle first it would have spun into Naydrad’s side a few inches below the point of impact and caused a deep and serious wound-if the blade had any actual physical existence at all! This is something I’m beginning to doubt. That is why I think we should widen the scope of this investigation. May I have permission to see Colonel Skempton and if necessary contact the Corps survey people, to check on the origins of recent arrivals?”

The expected explosion did not come. Instead O’Mara’s voice sounded almost sympathetic as he said, “I cannot decide whether you are honestly convinced that you’re onto something or simply that you’ve gone too far to back down without looking ridiculous. So far as I’m concerned you couldn’t look anymore ridiculous at the moment. You should not be afraid to admit you were wrong, Doctor, and begin repairing some of the damage to discipline your irresponsibility has caused.”

O’Mara waited precisely ten seconds for Conway’s reply, then he said, “Very well, Doctor. See the Colonel. And tell Prilicla I’m rearranging its schedule-it may be helpful to have your emotional echo-detector available at all times. Since you insist on making a fool of yourself you might as well do it properly. Afterward-well, we will be very sorry to see Mannon go, and in all honesty I suppose I must say the same about you. Both of you are likely to be on the same ship out …

A few seconds later he was dismissed very quietly.

Mannon himself had accused Conway of misguided loyalty and now O’Mara had suggested that his present stand was the result of not wanting to admit to a mistake. He had been given an out, which he had refused to take, and now the thought of service in the smaller multienvironment hospital, or even a planet-side establishment where the arrival of an e-t patient would be considered a major event, was beginning to come home to him. It gave him an unpleasantly gone feeling in the abdominal area. Maybe he was basing his theory on too little evidence and refusing to admit it. Maybe the odd errors were part of an entirely different puzzle, with no connection whatever with Mannon’s trouble. As he strode along the corridors, taking evading action or being evaded every few yards, the impulse grew in him to rush back to O’Mara, say yes to everything, apologize abjectly and promise to be a good boy. But by the time he was ready to give into it he was outside Colonel Skempton’s door.

Sector General was supplied and to a large extent maintained by the Monitor Corps, which was the Federation’s executive and law enforcement arm. As the senior Corps officer in the hospital, Colonel Skempton handled traffic to and from the hospital in addition to a horde of other administrative details. It was said that the top of his desk had never been visible since the day it arrived. When Conway was shown in he looked up, said “Good morning,” looked down at his desk and said, “Ten minutes …”

It took much longer than ten minutes. Conway was interested in traffic from odd points of origin, or ships which had called at such places. He wanted data on the level of technology, medical science and physiological classification of their inhabitants-especially if the psychological sciences or psionics were well-developed or if the incidence of mental illness was unusually high. Skempton began excavating among the papers on his desk.

But the supply ship, ambulances and ships pressed into emergency service as ambulances which had arrived during the past few weeks had originated from Federation worlds which were well known and medically innocuous. All except one, that was-the Cultural Contact and Survey vessel Descartes. It had landed, very briefly, on a most unusual planet. She was on the ground, if it could be called that, for only a few minutes. None of the crew had left the ship, the air-locks had remained sealed and the samples of air, water and surface material were drawn in, analyzed and declared interesting but harmless. The pathology department of the hospital had made a more thorough analysis and had had the same thing to say. Descartes had called briefly to leave the samples and a patient …

“A patient!” Conway almost shouted when the Colonel reached that point in his report. Skempton would not need an empathic faculty to know what he was thinking.

“Yes, Doctor, but don’t get your hopes up,” said the Colonel. “He had nothing more exotic than a broken leg. And despite the fact e-t bugs find it impossible to live on beings of another species, a fact which simplifies the practice of extraterrestrial medicine no end, ship medics are constantly on the lookout for the exception which is supposed to prove the rule. In short, he was suffering only from a broken leg.”

“I’d like to see him anyway,” said Conway.

“Level Two-eighty-three, Ward Four, name of Lieutenant Harrison,” said Skempton. “Don’t slam the door.”

But the meeting with Lieutenant Harrison had to wait until late that evening, because Prilicla’s schedule needed time to rearrange and Conway himself had duties other than the search for hypothetical disembodied intelligences. The delay, however, was fortunate because much more information was made available to him, gathered during rounds and at mealtimes, even though the data was such that he did not quite know what to do with it.

The number of boobs, errors and mistakes was surprising, he suspected, only because he had not interested himself in such things before now. Even so, the silly, stupid mistakes he encountered, especially among the highly trained and responsible OR staff, were definitely uncharacteristic, he thought. And they did not form the sort of pattern he had expected. A plot of times and places should have shown an early focal point of this hypothetical mental contagion becoming more widespread as the disease progressed. Instead the pattern indicated a single focus moving within a certain circumscribed area-the Hudlar theater and its immediate surroundings. Whatever the thing was, if there was anything there at all, it was behaving like a single entity rather than a disease.

… Which is ridiculous!” Conway protested. “Even I didn’t seriously believe in a disembodied intelligence-it was a working hypothesis only. I’m not that stupid!”

He had been filling Prilicla in on the latest developments while they were on the way to see the Lieutenant. The empath kept pace with him along the ceiling for a few minutes in silence, then said inevitably, “I agree.”

Conway would have preferred some constructive objections for a change, so he did not speak again until they had reached 283-Four. This was a small private ward off a larger e-t compartment and the Lieutenant seemed glad to see them. He looked, and Prilicla said that he felt, bored.

“Apart from some temporary structural damage you are in very good shape, Lieutenant,” Conway began, just in case Harrison was worried by the presence of two Senior Physicians at his bed. “What we would like to talk about is the events leading up to your accident. If you wouldn’t mind, that is.”

“Not at all,” said the Lieutenant. “Where do you want me to start? With the landing, or before that?”

“If you were to tell us a little about the planet itself first,” suggested Conway.

The Lieutenant nodded and moved his headrest to a more comfortable angle for conversation, then began, “It was a weirdie. We had been observing it for a long time from orbit …

Christened Meatball because Captain Williamson of the cultural contact and survey vessel Descartes had declined, very forcibly, to have such an odd and distasteful planet named after him, it had to be seen to be believed-and even then it had been difficult for its discoverers to believe what they were seeing.

Its oceans were a thick, living soup and its land masses were almost completely covered by slow-moving carpets of animal life. In many areas there were mineral outcroppings and soil which supported vegetable life, and other forms of vegetation grew in the water, on the sea bed, or rooted itself on the organic land surface. But the greater part of the land surface was covered by a layer of animal life which in some places was half a mile thick.

This vast organic carpet was subdivided into strata which crawled and slipped and fought their way through each other to gain access to necessary top surface vegetation or subsurface minerals or simply to choke off and cannibalize each other. During the course of this slow, gargantuan struggle these living strata heaved themselves into hills and valleys, altering the shapes of lakes and coastlines and changing the whole topography of their world from month to month.

It had been generally agreed by the specialists on Descartes that if the planet possessed intelligent life it should take one of two forms, and both were a possibility. The first type would be large — one of the tremendous, living carpets which might be capable of anchoring itself to the underlying rock while pushing extensions toward the surface for the purpose of breathing, ingestion, and the elimination of wastes. It should also possess a means of defense around its far-flung perimeter to keep less intelligent strata creatures from insinuating themselves between it and the ground below or from slipping over it and cutting off light, food, and air as well as discouraging sea predators large and small who seemed to nibble at it around the clock.

The second possibility might be a fairly small life-form, smooth skinned, flexible, and fast enough to allow them to live inside or between the strata creatures and avoid the ingestive processes of the strata beasts whose movements and metabolism were slow. Their homes, which would have to be safe enough to protect their young and develop their culture and science, would probably be in caves or tunnel systems in the underlying rock.

If either life-form existed on the planet it was unlikely that they would possess an advanced technology. Certainly the larger, complex type of industrial machinery was impossible on this heaving world. Tools, if they developed them at all, would be small, handy and unspecialized, but the chances were that it would be a very primitive society with no roots.

“They might be strong in the philosophical sciences,” Conway broke in at that point. Prilicla moved closer, trembling with Conway’s excitement as well as its own.

Harrison shrugged. “We had a Cinrusskin with us,” he said, looking at Prilicla. “It reported no indication of the more subtle type of emoting usually radiated by intelligent life, but the aura of hunger and raw, animal ferocity emanating from the whole planet was such that the empath had to be kept under sedation most of the time. This background radiation might well have concealed intelligent emoting. The proportion of intelligent life on any given world is only a small proportion of its total life …

“I see,” said Conway, disappointed. “How about the landing?”

The Captain had chosen an area composed of some thick, dry, leathery material. The stuff looked dead and insensitive so that the ship’s tail flare should not cause pain to any life in the area, intelligent or otherwise. They landed without incident and for perhaps ten minutes nothing happened. Then gradually the leathery surface below them began to sag, but slowly and evenly so that the ship’s gyros had no trouble keeping them level. They began to sink into what was at first a shallow depression and then a low-walled crater. The lips of the crater curled toward them, pressing against the landing legs. The legs were designed to retract telescopically, not fold toward the center line of the ship. The extension mechanism and leg housings began to give, with a noise like somebody tearing sheet metal into small pieces.

Then somebody or something began throwing rocks. To Harrison it had sounded almost as if Descartes was sitting atop a volcano in process of erupting. The din was unbelievable and the only way to transmit orders was through the suit radios with the volume turned way up. Harrison was ordered to make a quick damage check of the stern prior to takeoff.

I was between the inner and outer skin close to the venturi orifice level when I found the hole,” the Lieutenant went on quickly. “It was about three inches across and when I started to patch it I found the edges to be slightly magnetized. Before I could finish the Captain decided to take off at once. The crater wall was threatening to trap one of the landing legs. He did give us five seconds’ warning …”

Harrison paused at that point as if to clarify something in his own mind. He said carefully, “There wasn’t much danger in this, you understand. We were taking off at about one-and-a-half Gs because we weren’t sure whether the crater was a manifestation of intelligence, even hostile intelligence, or the involuntary movement of some dirty great beastie closing its mouth, so we wanted to avoid unnecessary destruction in the area. If I hung onto a couple of supporting struts and had somewhere to brace my feet I’d be all right. But long-duration suits are awkward and five seconds isn’t long. I had two good hand-holds and was looking for a bracket which should have been there to brace my foot. Then I saw it, and actually felt my boot touch it, but … but …

“You were confused and misjudged the distance,” Conway finished for him softly. “Or perhaps you simply imagined it was there.”

On the other side of the Lieutenant, Prilicla began to tremble again. It said, “I’m sorry, Doctor. No echoes.”

“I didn’t expect any,” said Conway. “It must have moved on by now.”

Harrison looked from one to the other, his expression puzzled and a little hurt. He said, “Maybe I did imagine it was there. Anyhow, it didn’t hold me and I fell. The landing leg on my side tore free during the takeoff and the wreckage of its housing plugged the inters kin space so tightly that I couldn’t get out. The engine room control lines passed too close to me for them to risk cutting me out, and our medic said it would be better to come here and let your heavy-rescue people cut a way in. We were coming here with the samples anyway.

Conway looked quickly at Prilicla, then said, “At any time during the trip back did your Cinrusskin empath monitor your emotional radiation?”

Harrison shook his head. “There was no need-I was having pain despite the suit’s medication and it would have been unpleasant for an empath. Nobody could get within yards of me …

The Lieutenant paused, then in the tone of one who wished to change an unpleasant subject he said brightly, “We’ll send down an unmanned ship next, packed with communications equipment. If that thing is just a big mouth connected with a bigger belly and with no brains at all, at worst we’ll lose a drone and it will get indigestion. But if it is intelligent or if there are smaller intelligent beings on the planet who maybe use, or have trained, the bigger beasties to serve them-that is a strong possibility, our cultural contact people say-then they are bound to be curious and try to communicate …”

“The imagination boggles,” said Conway, smiling. “At the present moment I’m trying hard not to think about the medical problems a beastie the size of a subcontinent would have. But to return to the here and now, Lieutenant Harrison, we are both very much obliged for the information you’ve given us, and we hope you won’t mind if we come again to—”

“Any time,” said Harrison. “Glad to help. You see, most of the nurses here have mandibles or tentacles or too many feet … No offense, Doctor Prilicla

“None taken,” said Prilicla.

… And my ideas regarding ministering angels are rather old fashioned,” he ended as they turned to go. His expression looked decidedly woebegone.

In the corridor Conway called Murchison’s quarters. By the time he had finished explaining what he wanted her to do she was fully awake.

“I’m on duty in two hours and don’t have any free time for another six,” she said, yawning. “And normally I do not spend my precious time off doing a Mata Han on lonely patients. But if this one has information which might help Doctor Mannon I don’t mind at all. I’d do anything for that man.

“How about me?”

“For you, dear, almost anything. “Bye.”

Conway racked the handset and said to Prilicla, “Something gained entrance to that ship. Harrison suffered the same type of mild hallucination or mental confusion that the OR staff experienced. But I keep thinking about that hole in the outer skin-a disembodied intelligence shouldn’t have to make a hole to get in. And those rocks hitting the stern. Suppose this was only a side-effect of the major, nonmaterial influence-a disturbance analogous to the poltergeist phenomena. Where does that leave us?”

Prilicla didn’t know.

“I’ll probably regret it,” said Conway, “but I think I’ll call O’Mara …”

But it was the Chief Psychologist who did all the talking at first. Mannon had just left his office after having told O’Mara that the Hudlar patient’s condition had deteriorated suddenly, necessitating a second operation not later than noon tomorrow. The Senior Physician, it had been obvious, held no hopes for the patient’s survival, but had said that what little chance it did have would be fractionally increased if they operated quickly.

O’Mara ended, “This doesn’t give you much time to prove your theory, Conway. Now, what did you want to say to me?”

The news about Mannon had put Conway badly off his stride, so that he was woefully aware that his report on the Meatball incident and his ideas regarding it sounded weak and, what was worse where O’Mara was concerned, incoherent. The psychologist had little patience with people who did not think clearly and say exactly what they meant.

And the whole affair is so peculiar,'' he concluded awkwardly, “that I’m almost convinced now that the Meatball business has nothing to do with Mannon’s trouble, except that …”

“Conway!” said O’Mara sharply. “You’re talking in circles, dithering! You must realize that if two peculiar events occur with only a small separation in time then the probability is high that they have a common cause. I don’t mind too much if your theory is downright ridiculous — at least you arrived at it by a tortuous form of logic — but I do mind you ceasing to think at all. Being wrong, Doctor, is infinitely preferable to being stupid!”

For a few seconds Conway breathed heavily through his nose, trying to control his anger enough to reply. But O’Mara saved him the trouble by breaking the connection.

“He was not very polite to you, friend Conway,” said Prilicla. “Toward the end he sounded quite bad-tempered. This is a significant improvement over his feelings for you this morning …

Conway laughed in spite of himself. He said, “One of these days you will forget to say the right thing, Doctor, and everyone in the hospital will drop dead!”

The galling part of the whole affair was that they did not know what exactly they were looking for, and now their time for finding it had been cut in half. All they could do was to continue gathering information and hope that something would emerge from it. But even the questions sounded nonsensical-variations of “Have you done or omitted to do something during the past few days which might lead you to suspect that something was influencing your mind?” They were loosely worded, silly, almost meaningless questions, but they went on asking them until Prilicia’s pencil-thin legs were rubbery with fatigue-the empath’s stamina was proportional to its strength, which was practically nonexistent-and it had to retire. Doggedly Conway went on asking them, feeling more tired, angrier and more stupid with every hour which passed.

Deliberately he refrained from contacting Mannon again-the Doctor at that time would, if anything, be a demoralizing influence. He called Skempton to ask if Descartes’ medical officer had made a report, and was sworn at horribly because it was the middle of the Colonel’s night. But he did find out that the Chief Psychologist had called seeking the same information, saying that he preferred his facts to come from the official report rather than through an emotionally involved Doctor with a disembodied ax to grind. Then the totally unexpected happened in that Conway’s sources of information went suddenly dry on him.

Apparently O’Mara was bringing in certain operating room staff for their periodic testing before their psych tests were due, and most of them had been people who had been very helpful about admitting their mistakes to Conway. It was not suggested in so many words that Conway had broken confidence and blabbed to O’Mara, but at the same time nobody would talk about anything.

Conway felt weary and discouraged and stupid, but mostly weary. It was too near breakfast time, however, to go to bed.

After his rounds Conway had an early lunch with Mannon and Prilicla, then accompanied the doctor to O’Mara’s office while the empath left for the Hudlar theater to monitor the emotional radiation of the staff during their preparations. The Chief Psychologist looked a little tired, which was unusual, and rather grumpy, which was usually a good sign.

“Are you assisting Senior Physician Mannon in this operation, Doctor?”

“No, sir, observing,” Conway replied. “But from inside the theater. If anything funny is going on — I mean, the Hudlar tape might confuse me and I want to be as alert as possible—”

“Alert, he says.” O’Mara’s tone was scathing. “You look asleep on your feet.” To Mannon he said, “You will be relieved to know that I, too, am beginning to suspect something funny is going on, and this time I’ll be observing from the observation blister. And now if you’ll lie on the couch, Mannon, I’ll give you the Hudlar tape myself …

Mannon sat on the edge of the low couch. His knees were nearly level with his chin and he had half-folded his arms across his chest so that his posture was almost a fetal position, sitting up. When he spoke his tone was pleading, desperate. He said, “Look. I’ve worked with empaths and telepaths before. Empaths receive but do not project emotion, and telepaths can only communicate with other telepaths of their own species-they’ve tried occasionally, but all they did was give me a slight mental itch. But that day in the theater I was in complete mental control of myself-f am absolutely sure of this! Yet you all keep trying to tell me that something unsubstantial, invisible and undetectable influenced my judgment. It would be much simpler if you admitted that this thing you’re looking for is nonexistent as well, but you’re all too damned—”

“Excuse me,” said O’Mara, pushing Mannon backward and lowering the massive helmet into position. He spent a few minutes positioning the electrodes, then switched on. Mannon’s eyes began to glaze as the memories and experience of one of the greatest Hudlar physicians who had ever lived flooded into his brain.

Just before he lost consciousness completely he muttered, “My trouble is that no matter what I say or do, you believe only the best about me …

Two hours later they were in the theater. Mannon wore a heavy operating suit and Conway a lighter type which relied only on its gravity neutralizers for protection. The G-plates under the floor were set for a pull of five gravities, the Hudlar normal, but the pressure was only a fraction higher than the Earth norm-Hudlars were not unduly bothered by low pressure and could, in fact, work quite without protection in the vacuum of space. But if something went disastrously wrong and the patient needed full, home-planet pressure, Conway would have to leave in a hurry. Conway had a direct line to Prilicla and O’Mara in the observation blister and another, and completely separate, channel linking him with Mannon and the operating staff.

O’Mara’s voice crackled suddenly in his ear-piece. “Prilicla is getting emotional echoes, Doctor. Also the radiation indicative of a minor error having been made-minor level anxiety and confusion …

“Yehudi is here,” said Conway softly.

“What?”

“The little man who isn’t there,” Conway replied, and went on, misquoting slightly, “The little man upon the stair. He isn’t there again today, Oh, gee I wish he’d go away …

O’Mara grunted, then said, “Despite what I told Mannon in my office there is still no real proof that anything untoward is happening. My remarks then were designed to help both Doctor and patient by bolstering Mannon’s weakening self-confidence-something which they failed to do. So it would be better for Mannon and yourself if your little man came in and introduced himself.”

The patient was brought in at that moment and transferred to the table. Mannon’s hands, projecting from the heavy arms of the suit, were encased only in thin, transparent plastic, but should full Hudlar pressure become necessary he could snap on heavy gauntlets within a few seconds. But to open a Hudlar at all in these conditions was to cause an immediate decompression, so that the subsequent procedures had to be done quickly.

Physiological classification FROB, the Hudlar was a low, squat, immensely powerful being somewhat reminiscent of an armadillo with a tegument like flexible armor plate. Inside and out the Hudlars were tough-so much so that Hudlar medical science was a almost complete stranger to surgery. If a patient could not be cured by medication very often it could not be cured at all, because surgery on that planet was impracticable if not downright impossible. But in Sector General, where pressure and gravity of any desired combination could be produced at a few minutes notice, Mannon and a few others had been nibbling at the edges of the hitherto impossible.

Conway watched him make a triangular incision in the incredibly tough tegument and clamp back the flap. Immediately a bright yellow, inverted cone of mist flicked into being above the operative field-a fine spray of blood under pressure escaping from the severed capillaries. A nurse quickly interposed a sheet of plastic between the opening and Mannon s visor while another positioned a mirror which gave him an indirect view of the operative field. In four and a half minutes he had controlled the bleeding. He should have done it in two.

Mannon seemed to be reading Conway’s mind, because he said, “The first time was faster than this-I was thinking two or three moves ahead, you know how it is. But I found I was making incisions now that I shouldn’t have made until several seconds later. If it had happened once it would have been bad enough, but five times …! I had to withdraw before I killed the patient there and then.

“And now,” he added in a voice thick with self-loathing, “I’m trying to be careful and the result will be the same.

Conway remained silent.

“Such a piddling little growth, too,” Mannon went on. “So near the surface and a natural for the first attempt at Hudlar surgery. Simply cut away the growth, encase the three severed blood vessels in the area with plastic tubing, and the patient’s blood pressure and our special clamps should make a perfect seal until the veins regenerate in a few months. But this …! Have you ever seen such a botched-up mess …

More than half of the growth, a grayish, spongy mass which seemed to be more than half vegetable, remained in position. Five major blood vessels in the area had been severed-two of necessity, the rest by “accident"-and encased in tubing. But these lengths of artificial vein were too short or insecurely clamped-or perhaps the movement of the heart had pulled one of the vessels partially out of its tube. The only thing which had saved the patient’s life had been Mannon’s insistence that it was not to be allowed to regain consciousness since the first operation. The slightest physical effort could have pulled one of those vessels free of its tubing and caused a massive internal hemorrhage and, with the tremendous pulse rate and pressure of the Hudlar species, death within a few minutes.

On O’Mara’s channel Conway said harshly, “Any echoes? Anything at all?”

“Nothing,” said O’Mara.

“This is ridiculous!” Conway burst out. “If there is an intelligence, disembodied or otherwise, it should possess the attributes-curiosity, the ability to use tools, and so on. Now this hospital is a large and interesting place, with no barriers we know of to the movements of the entity we are trying to find. Why then had it stayed in one place? Why didn’t it go prowling around Descartes? What makes it stay in this area? Is it frightened, or stupid, or disembodied even?

“There is little likelihood of finding a complex technology on Meatball,” Conway went on quickly, “but a good chance of them being well advanced in the philosophical sciences. If something physical boarded Descartes, there is a definite lower limit to the mass of an intelligent being …

“If you want to ask questions of anyone, Doctor,” O’Mara said quietly, “I will throw a little of my weight behind them. But there isn’t much time.”

Conway thought for a moment, then said, “Thank you, sir. I’d like you to get Murchison for me. She’s in—”

“At a time like this,” said O’Mara in a dangerous voice, “he wants to call his …

“She’s with Harrison at the moment,” said Conway. “I want to establish a physical connection between the Lieutenant and this theater, even though he has never been within fifty levels of the place. Would you ask her to ask him …

It was a long, involved, many-sided question, designed to tell him how a small, intelligent life-form had reached this area without detection. It was also a stupid question because any intelligence which affected the minds of Earth-humans and e-ts alike could not have remained undetected with an empath like Prilicla around. Which left him back where he started with a nonmaterial something which refused, or was incapable of, moving beyond the environs of the theater.

“Harrison says he had lots of delusions during the trip back,” O’Mara’s voice sounded suddenly. “He says the ship’s doctor said this was normal considering all the dope he had in him. He also says he was completely out when he arrived here and doesn’t know how or where he came in. And now I suppose we contact Reception, Doctor. I’m patching you in, just in case I ask the wrong questions …

Seconds later a slow, flat, translated voice which could have belonged to anything said, “Lieutenant Harrison was not processed in the usual way. Being a corpsman whose medical background was known in detail he was admitted to Service Lock Fifteen into the charge of Major Edwards.

Edwards was not available, but his office promised O’Mara that they would have him in a few minutes.

All at once Conway felt like giving up. Lock Fifteen was too far away-a difficult, complicated journey involving three major changes of environment. For their hypothetical invader, who was also a stranger to the hospital, to find its way to this theater would have necessitated it taking mental control of someone and being carried. But if that was the case Prilicla would have detected its presence. Prilicla could detect anything which thought-from the smallest insect to the slow emanations of a mind deeply and totally unconscious. No living thing could shut its mind down completely and still be alive.

Which meant that the invader might not be alive!

A few feet distant Mannon had signaled for a nurse to stand by the pressure cock. A sudden return to Hudlar normal pressure would diminish the violence of any bleeding which might occur, but it would also make it impossible for Mannon to operate without heavy gloves. Not only that, the pressure increase would cause the operative field to subside within the opening, where movement transmitted from the nearby heart would make delicate work impossible. At present, despite the danger of a wrong incision, the complex of blood vessels was distended, separate and relatively motionless.

Suddenly it happened. Bright yellow blood spurted out, so violently that it hit Mannon’s visor with an audible slap. Driven by the patient’s enormous blood pressure and pulse rate the severed vein whipped about like a miniature unheld hose-pipe. Mannon got to it, lost it, tried again. The spurting became a thin, wavering spray and stopped. The nurse at the pressure cock relaxed visibly while the one at Mannon’s side cleaned his visor.

Mannon moved back slightly while the field was sucked clear. Through the visor his eyes glittered oddly in the sweating white mask of his face. Time was important now. Hudlars were tough, but there were limits-they could not stand decompression indefinitely. There would be a gradual movement of body fluid toward the opening in the tegument, a strain on vital organs in the vicinity and an even greater increase in blood pressure. To be successful the operation could not last for much more than thirty minutes and more than half the time had gone merely in opening up the seat of the trouble. Even if the growth was removed, its removal entailed damage to underlying blood vessels which had to be repaired with great care before Mannon withdrew.

They all knew that speed was essential, but to Conway it seemed suddenly as if he was watching a film which was steadily being speeded up. Mannon’s hands were moving faster than Conway had ever seen them move before. And faster still.

“I don’t like this,” said O’Mara harshly. “It looks like he’s regained his confidence, but more likely that he’s ceased caring-about himself, that is. He still cares about the patient, obviously, even though he knows it hasn’t much chance. And the tragic thing about it is that it never did have much chance, Thornnastor tells me. If it hadn’t been for your hypothetical friend’s interference Mannon wouldn’t have worried too much about losing this patient-it would have been one of his very few failures. When he made that first slip it wrecked his self-confidence and now he’s—”

“Something made him slip,” said Conway firmly.

“You’ve tried convincing him of that, with what result?” the psychologist snapped back. He went on, “Prilicla is seriously agitated and its shakes are getting worse by the minute. But Mannon is, or was, a pretty stable type I don’t think he’ll crack until after the operation. Though with these serious, dedicated types whose profession is their whole life it’s hard to say what might happen.”

“Edwards here,” said a new voice. “What is it?”

“Go ahead, Conway,” said the psychologist. “You ask the questions. Right now I’ve other things on my mind.”

The spongy growth had been lifted clear, but a great many small blood vessels had been severed to accomplish this and the job of repairing them would be much more difficult than anything which had gone before. Insinuating the severed ends into the tubing, far enough so that they would not simply squirm out again when circulation was restored, was a difficult, repetitious, nerve-wracking procedure.

There were only eighteen minutes left.

“I remember Harrison well,” the distant Edwards replied when Conway had explained what he wanted to know. “His suit was damaged in the leg section only, so we couldn’t write it off-those things carry a full set of tools and survival gear and are expensive. And naturally we decontaminated it! The regulations expressly state that—”

“It still may have been a carrier of some kind, Major,” Conway said quickly. “How thoroughly did you carry out this decon—”

“Thoroughly,” said the Major, beginning to sound annoyed. “If it was carrying any kind of bug or parasite it is defunct now. The suit together with all its attachments was sterilized with high-pressure steam and irradiated-it went through the same sterilization procedure as your surgical instruments, in fact. Does that satisfy you, Doctor?”

“Yes,” said Conway softly. “Yes indeed.”

He now had the link-up between Meatball and the operating theater, via Harrison’s suit and the sterilization chamber. But that wasn’t all he had. He had Yehudi!

Beside him Mannon had stopped. The surgeon’s hands were trembling as he said desperately, “I need eight pairs of hands, or instruments that can do eight different operations at once. This isn’t going well, Conway. Not well at all …

“Don’t do anything for a minute, Doctor,” Conway said urgently, then began calling out instructions for the nurses to file past him carrying their instrument trays. O’Mara started shouting to know what was going on, but Conway was concentrating too hard to answer him. Then one of the Kelgian nurses made a noise like a foghorn breathing in, the DBLF equivalent of a shriek of surprise, because suddenly there was a medium sized box spanner among the forceps on her tray.

“You won’t believe this,” said Conway joyfully as he carried the- thing-to Mannon and placed it in the surgeon’s hands, “but if you’ll just listen for a minute and then do as I tell you …

Mannon was back at work in less than a minute.

Hesitantly at first, but then with growing confidence and speed, he resumed the delicate repair work. Occasionally he whistled through his teeth or swore luridly, but this was normal behavior for Mannon during a difficult op which was promising to go well. In the observation blister Conway could see the happily scowling, baffled face of the Chief Psychologist and the fragile, spidery body of the empath. Prilicla was still trembling, but very slowly. It was a type of reaction not often seen in a Cinrusskin off its native planet, indicating a nearby source of emotional radiation which was intense and altogether pleasant.

After the operation they had all wanted to question Harrison about Meatball, but before they could do so Conway had first to explain what had happened again to the Lieutenant.

“… And while we still have no idea what they look like,” Conway was saying, “we do know that they are highly intelligent and in their own fashion technically advanced. By that I mean they fashion and use tools …

“Indeed yes,” said Mannon dryly, and the thing in his hand became a metallic sphere, a miniature bust of Beethoven and a set of Tralthan dentures. Since it had become certain that the Hudlar would be another one of Mannon’s successes rather than a failure he had begun to regain his sense of humor.

… But the tool-making stage must have followed a long way after the development of the philosophical sciences,” Conway went on. “The imagination boggles at the conditions in which they evolved. These tools are not designed for manual use, the natives may not possess hands as we know them. But they have minds …

Under the mental control of its owner the “tool” had cut a way into Descartes beside Harrison’s station, but during the sudden takeoff it had been unable to get back and a new source of mental control, the Lieutenant, had unwittingly taken over. It had become the foothold which Harrison had needed so badly, only to give under his weight because it had not really been part of the ship’s structure. When the attachments of Harrison’s suit had been sterilized in the same room as the surgical instruments and when a nurse had come looking for a certain instrument for the theater, it again became what was wanted.

From then on there was confusion over instrument counts and falling scalpels which did not cut and sprayers which behaved oddly indeed, and Mannon had used a knife which had followed his mind instead of his hands, with near-fatal results for the patient. But the second time it happened Mannon knew that he was holding a small, unspecialized, all purpose tool which was subject to mental as well as manual control, and some of the shapes he had made it take and the things he had made it do would make Conway remember that operation for the rest of his life.

… This … gadget … is probably of great value to its owner,” Conway finished seriously. “By rights we should return it. But we need it here, many more of them if possible! Your people have got to make contact and set up trade relations. There’s bound to be something we have or can do that they want …

“I’d give my right arm for one,” said Mannon, then added, grinning, “My right leg, anyway.”

The Lieutenant returned his smile. He said, “As I remember the place, Doctor, there was no shortage of raw meat.”

O’Mara, who had been unusually silent until then, said very seriously, “Normally I am not a covetous man. But consider the things this hospital could do with just ten of those things, or even five. We have one and, if we were doing the right thing, we would put it back where we found it — obviously a tool like this is of enormous value. This means that we will have to buy or conduct some form of trade for them, and to do this we must first learn to communicate with their owners.”

He looked at each of them in turn, then went on sardonically. “One hesitates to mention such sordid commercial matters to pure-minded, dedicated medical men like yourselves, but I must do so to explain why, when Descartes eventually makes contact with the beings who use the tools, I want Conway and whoever else he may select to investigate the medical situation on Meatball.

“Our interest will not be entirely commercial, however,” he added quickly, “but it seems to me that if we have to go in for the practice of barter and exchange, the only thing we have to trade is our medical knowledge and facilities.”