microfilm or voiceprints.”
“It's fantastic!” said Nelson.
“It has its uses,” agreed Landon, placing the paper back into the same slot. “I'm about to show you its major purpose.” He pressed the button once more. “Landon again,” he announced. “Put the whole map on dim.”
The galaxy dimmed until the nearer and larger stars were barely visible, and the planets and more distant stars were not to be seen at all. It looked, thought Nelson, like the death throes of the universe. “Okay,” said Landon. “Give me Earth again, on bright.” Five miles away a tiny light flashed on, brighter than the brightest sun. “Fine. Now, starting with Sirius V, flash every planet we control, put them on bright yellow, and leave them on. Give me a rate of five a second.” Nelson watched for almost seven minutes as a cascade of brilliant yellow dots rippled forth from Earth to Deluros VIII, then spread radially throughout the main body of the galaxy. And all had originated from Earth. A thrill of pride ran through him as he watched a two-millennium history of human endeavor take place before his eyes.
“Very good,” said Landon. “Now pinpoint every Republic ship that bears arms, put them in green, and keep them flashing at half-second intervals.” Suddenly the pseudo-galaxy was alive with green. More than twenty million lights blinked on and off hypnotically, most of them within the periphery of yellow lights, but some—a million or so—well in advance of Man's frontiers.
“Fine,” announced Landon. “Now, in blue, give me every planet capable of supporting human life, but not yet colonized by Man.” He paused a second, then added: “Flash all those that are currently inhabited by intelligent alien races on a quarter-second blink.” In total silence, another forty thousand lights flashed on brightly, and now the hue of the galactic scheme took on a bluish tint. Nelson was overwhelmed by the scope of the blue worlds, and hazarded a guess that about a tenth of them were blinking on and off, while the rest remained constant. “One last request,” said Landon. “In very bright red, let me see every world possessed of sentient nonhumans that might have the potential to resist us militarily.” Another plethora of lights went on, well over three thousand of them, red and blinding. Individually, except for the initial steps of Man's expansion into the galaxy, there was no pattern. But now, as Nelson stood back and let his eyes pour over the brilliant-hued panorama before him, he began to see channels of force and expansion, paths of greater and lesser resistance through which Man could thread his way.
“Do you begin to understand the significance of the Department of Cartography?” asked Landon. “I think so,” replied Nelson.
“We are, in a very real sense, the expansionist movement of the Republic. With our facilities here at Caliban, we and we alone are in possession of enough data to know which planets are of value, which