'No,' Harper said. 'I know who has a key. Everyone has a neighbour's key in case of fire. Wait here.' He went off down the lane. All around us the banging and clanging resounded in our ears. Goodwife Gristwood began twisting her hands together nervously.
Her son reappeared, a large key in his hands. He unlocked the door and we entered the yard. It was indeed a good place for Michael and Sepultus to have chosen; the high wall enclosed it on three sides and the windowless rear of the adjacent house occupied the fourth. There was a pile of pipes and valves, for Leighton's work on the conduits, no doubt. Blackened patches all over the walls caught my eye, like the ones I had seen in the Gristwoods' yard only larger.
Goodwife Gristwood and her son were standing nervously by the gate. I gave David Harper a reassuring smile – he looked as though he might run off any minute.
'Master Harper,' I said, 'tell me: does anything unusual strike you about this yard?'
He looked around. 'Only that it's been given a good clean recently.'
I nodded. 'That's what I thought. It's spotless.'
'Why would anyone want to keep a founder's yard spotless?' Barak asked.
'To hide all traces of what had been here.' I bent close to him and whispered, 'I think someone has removed the apparatus, and all traces of Greek Fire as well.'
'Leighton?'
'Possibly. Come, I think we should have a look in the house.'
I led the way out of the yard. We knocked again at the house door, but still there was no sign of life. I wiped a hand over my brow; it seemed hotter and stickier than ever up here among the foundries. All around us the clanging and scrating continued.
'We can get in via the workshop,' Harper said. 'It's the same key.' He hesitated, then opened the workshop door and stepped inside calling, 'Master Leighton?' Barak followed him.
'I'll stay outside,' Goodwife Gristwood said nervously. 'Take care, David.'
I followed Barak in. David opened the shutters and I saw a cluttered workshop, more pipes and valves and pans and an empty furnace. Harper picked up a coal from it. 'Stone cold,' he said.
Set in one wall was a door to the house. Harper hesitated, then inserted the key in the lock and opened it. Another darkened room. I caught a slight, familiar tang and grabbed Barak's arm. 'Wait,' I said.
Harper opened the shutters and turned round. Then his mouth fell open. We were in a parlour, surprisingly well appointed, but it was in chaos. The buffet cupboard had been overturned and lay on its side, silver plates scattered around.
David Harper had gone pale. He stood with his hand over his mouth. 'They got him too,' I whispered. 'They took the apparatus and killed him.'
'Then where's the body?' Barak asked.
'Somewhere in the house, maybe. I smell blood.' Instructing Harper to stay where he was, Barak and I searched the rest of the founder's home, Barak drawing his sword as we climbed the narrow stairs. Everything was in order, it was only the parlour that had been wrecked. We returned there to find David Harper had gone outside; through the window I saw him with his mother, looking at the house with a frightened expression. A man with a load of pans on his back passed by, giving them a puzzled look.
'They took the body with them,' I said, 'together with the apparatus. They didn't want a hue and cry about a murder in Lothbury.' I knelt and examined the floor. 'See, this part of the floor's been cleaned, there's no dust.' I saw a pair of flies buzzing around the overturned buffet, and took a deep breath. 'Here, Barak, help me move this.'
I wondered what horror we might find underneath the buffet, but there was only a patch of dried blood. Barak whistled.
'Where did they get the key?'
'From Leighton's body, perhaps.' I looked over to the front door. 'They didn't break the door in. I guess they knocked, and when Leighton answered they shoved him inside and then followed and killed him. Probably a quick blow with an axe again.'
'Risky. What if he called out and neighbours came? Harper's right, the founders are a close lot.'
'Perhaps Leighton knew them.' I bit my lip. 'Or knew someone who was with them. One of our potential conspirators, maybe.'
'We should ask the neighbours.'
'We can, but I'm willing to bet they came at night when no one was about. Come, there's no more we can do here.'
We rejoined Harper and Goodwife Gristwood in the street. Standing together, they were very alike, even to their looks of drawn anxiety.
'What's happened, sir?' Harper asked. 'Is Master Leighton-'
'He is not there. But I am afraid there are signs of violence-'
Goodwife Gristwood gave a little moan.
'I am concerned for the safety of you and your son, madam,' I said. 'Is the watchman still at your house?'
'Ay, he brought me here, then I sent him back.'
I turned to Harper. 'I think your mother should stay with you for now. I will try and find somewhere safer.'
The old woman gave me an appalled look. 'What did they do? For Jesu's sake, what did Michael and Sepultus
'Meddled with dangerous people.'
