a trap door in the ceiling. Climbing swiftly, I shot back the bolt which held it fast and emerged, shivering, onto the roof. Broken only by low balustrades, it stretched to my left and right, joining together all the houses on this side of the Mesi in one elegant line. It would have been easy, I thought, for the assassin to escape down any of their stairs. Before me I could see Constantine the Great atop his column in the forum, only a little higher than I, and behind him the domes of Ayia Sophia, the church of holy wisdom. Wisdom, I thought, that I could well use.
Turning my eyes downwards, onto the street, I could see Aelric again, still standing impassive amid the thronging traffic. Though he seemed even smaller from this height, I could yet see much more of him than from below, even when others passed beside him. And likewise he me – he waved a salute as he noticed me peering down on him.
‘Yes,’ I murmured to myself. This was where you could have shot an arrow at the Emperor, and hit the ribs of a guardsman beyond by mistake. I knelt by the parapet which lined the edge of the roof. There were scratches in the stone, I saw with rising excitement – and there, just at the base of the wall where moss grew in the shaded cracks . . .
‘Date stones?’ The Varangian captain had followed my eyes and caught what I had seen, a small scattering of date-palm seeds; now he tipped back his head and gave a great, bellowing laugh. It was not a comfortable sound.
‘Congratulations, Demetrios Askiates,’ he said, picking up one of the pips and tossing it in his free hand. ‘You’ve found a murderer who shoots like Ullr the huntsman, and has a taste for dried fruits. Miraculous!’
The captain stayed with me while I interviewed the carver and his family; I doubt it put them at their ease. The carver, a thin man with fine hands, trembled and stammered his way through a simple enough story: that he had been in his shop all morning, while the apprentices worked upstairs; that they had all three of them gone out to the arcade to watch the Emperor pass; and that they had been dumbfounded to be seized by the Varangians moments later – they had not even seen the soldier die, though they had noticed a commotion on the far side of the street. The carver chewed on his nails, twisting and tearing at them as he swore that he had locked the gate behind him, that nobody could have crept in while he was outside. His wife had been upstairs, he explained, and he had had thieves before, even on holy saints’ days curse them. Now, he said mournfully, he was forced to be ever vigilant. At that the Varangian captain snorted, which did nothing to soothe the carver.
The apprentices had little to add, though it took me the better half of an hour to establish so. They sat back sullenly on their stools and said nothing that was not prompted, regarding me for the most part with the inscrutable gaze of adolescence. Yes, they had been hard at work in the workshop before their master called them down to watch the procession – he was a fair man, they said, though demanding in his craft. He might have locked the door – they did not know, but he often did: he had a terror of thieves.
‘Was the door locked when you came in?’ I asked the captain, after I had dismissed the boys.
‘I wasn’t the first in. Aelric was.’
‘Can you ask him?’
The captain’s face, never reserved at the best of times, said plainly that he thought this a worthless task for an officer of the Emperor’s bodyguard, and I fancied he made even more noise than usual stamping down the stairs. I let it pass as the carver’s wife came into the room. She was younger than her husband, with a darker complexion and a fuller figure, though she dressed modestly and wore a scarf low over her face, casting her eyes in shadow. Her children were with her – two girls, very young, and a boy of about ten, none of whom would look at me. Behind them, I saw the dividing curtain