Night on the Aventine, my favourite hill. Stars and the mysterious steady glow of planets are piercingwisps of cloud. A persistent August temperature, with not enough air to breathe. Sleepers lying naked, or twisting unhappily on top of crumpled bed covers. Hardly a lover's cry or an owl's screech to be heard. Those few short hours when rollickers have fallen silent, slumped at unlit tables in the lowest drinking-houses as the whores give up on them in exhaustion or contempt. The dedicated partygoers are all away at the coast, splitting the Campanian darkness with their flutes, castanets and hysteria, allowing Rome some peace. The wheeled carts that flood the city in thousands at dusk all seem to be stationary at last.
The dead of night, when sometimes rain begins imperceptibly, increasing in force until thunder cracks – though not tonight. Tonight there is only the suffocating August heat, in the brief dull period when nothing stirs, a little before dawn.
Suddenly Helena Justina is shaking me awake. 'Marcus!' she hisses. Her urgency breaks through my troubled dream of being hunted by a large winged rissole dripping fishpickle sauce. Her fear shakes me into instant watchfulness. I reach for a weapon – then start fumbling after a means of light. I have lived with her for three years. I realise what the crisis is: not a sick child or a barking dog, not even the violence of Aventine low life in the streets outside. A high-pitched whine has disturbed her rest. She has heard a mosquito just above her head.
An hour later, sandal in hand, bleary-eyed and furious, I have chased the sly tormentor from ceiling to shutter, then into and sneakily out of the folds of a cloak on a doorpeg. Helena is craning her eyes, now seeing its cursed body shape in every shadow and doorframe cranny. She smacks her hand on a knot in a wooden panel that I have already tried to kill three times.
We are both naked. It is not erotic. We are friends, bound by our hatred of the devious insect. Helena is obsessive because it is her sweetskin they always seek; mosquitoes home in on her with horrific results. We both suspect, too, that they carry summer diseases that might kill our child or us. This is an essential ritual in our house. We have a pact that any mosquito is our enemy, and together we chase this one from bed to wall until at last I swat the thing successfully. The blood on the wall plaster – probably ours – is our sign of triumph.
We fall together into bed, arms and legs entwined. Our sweat mingles. We fall asleep at once, knowing we are safe.
I start awake, certain that I have heard another insistent high-pitched whine above my ear. I lie rigid, while Helena sleeps. Still believing I am listening for trouble, I too fall asleep again, and dream that I am chasing insects the size of birds: I am on guard. I am the trained watcher, keeping the night safe for those I love. Yet I am unaware of the shadows that flit through the laundry colonnade in Fountain Court. I cannot hear the furtive feet as they creep up the stairs, nor even the crash of the monstrous boot as it kicks in a door.
The first I know of it is when Marius, my nephew and puppy-loving lodger, runs in yelling that he cannot sleep because of a row from the tenement opposite.
That is when I do grab my knife and run. Once awake, I can tell where the commotion is, and I know – with cold fear in my heart – that somebody is attacking my friend Lucius Petronius.