'I hoped that you'd come,' said Christopher.

'Did you?'

'I need your a.s.sistance.'

'What can I do, Mr Redmayne?'

'Two things,' explained the architect. 'Firstly, you can help me to drive out some of the demons that have been inside my skull since my brother was arrested. Secondly, you can trust my judgement.'

'Your judgement?'

'I firmly believe that Henry is innocent.'

'Any brother would feel like that,' said Jonathan cautiously. 'But you have to accept that there must be substantial evidence against him for an arrest to be made.'

'I know what that evidence is.'

'Do you?'

'I visited Henry this morning in Newgate.'

'How was he?'

'Still overwhelmed by the turn of events.'

'Prison comes as a terrible shock for a gentleman.' 'It comes as a shock for anyone, Jonathan,' said the other. 'I saw some of the filthy cells in which the prisoners are kept. I'd not house animals in conditions like that.'

'Newgate is better than some of the other gaols.'

'Then they should be pulled down and rebuilt. Even criminals have the right to be treated as human beings. If I'd designed Newgate, I wouldn't spend all that money on a beautiful exterior that none of the prisoners can see. I'd make sure they had clean water, proper drains and larger windows to let in more light and air. Yes,' said Christopher, 'and there'd be far more single cells to allow a degree of privacy.'

'Privacy costs a lot of money in prison,' said Jonathan.

"That's what Henry has found. He's already spent everything in his purse. Luckily, I was able to replenish his funds.'

'Were you able to speak to him alone?'

'Yes, I was. Thanks to a bribe.'

'Did he plead his innocence?'

'No,' said Christopher, shaking his head, 'that was the strange thing.'

Jonathan was astonished. 'He confessed to the murder?'

'Not exactly. What Henry admitted was the possibility that he might have been guilty of killing Jeronimo Maldini. He was not entirely certain.'

'He must have been. Either he stabbed the victim or he did not.'

"There was more than just stabbing involved,' Christopher reminded him. "The body was dropped into the freezing water of the Thames and that's one charge that could never be laid at Henry's door.'

'Why not?'

'Because he was too drunk to walk properly, let alone carry a dead body.'

'I thought that drink might be involved,' said Jonathan ruefully.

'Henry's eternal weakness, I fear. One of them, anyway,' added Christopher sadly, 'for my brother is liberal in his choice of vices.'

'They appear to have caught up with him at last, Mr Redmayne.'

'Newgate has certainly been a sobering experience for him.'

Christopher was standing behind the table on which his latest architectural drawing was set out. Lying on top of it was a piece of paper that he used to make some jottings. He picked it up to glance at what he had written.

'What's convinced you that your brother is innocent?' asked Jonathan.

'His account of what happened.'

'It sounds as if he's very confused.'

'Henry is completely bewildered.'

'Rumour has it that he and the murder victim were arch enemies.'

'They were certainly not the best of friends. Thus it stands,' said Christopher, keen to rehea.r.s.e the facts for his own benefit as much as for that of his visitor. 'Henry was enjoying the pleasures of the town one evening when he happened to cross the path of Signor Maldini. There was a violent argument - in front of witnesses - during which my brother became so incensed that he threatened to kill the man.'

'Is he in the habit of issuing such threats?'

'No, Jonathan, that's what makes this so worrying.'

'What was it about the Italian gentleman that enraged him so much?'

'Henry believed that he cheated at cards.'

'Is that reason enough to murder him?'

'To threaten him with murder,' said Christopher. 'And the answer is yes. Cheating is a cardinal sin to those who wager large amounts on the turn of a card. But there were other reasons why my brother disliked the fellow so intensely. I've yet to drag all of them out of him.'

'Go on,' encouraged Jonathan. 'I'm sorry to interrupt.'

'Signor Maldini was a hot-blooded man. When Henry threatened him, he drew his sword and would have attacked my brother there and then if the others had not pulled him away. It was, apparently, an ugly scene.'

'What happened then?'

'Henry and his friends rolled on to a tavern for supper. If they were not drunk when they went in there, they certainly were by the time they came out. They split up and went their separate ways. My brother had forgotten all about the quarrel with Jeronimo Maldini. The gentleman himself, however, had not.'

'He was lying in wait for your brother,' guessed the constable.

'Yes,' said Christopher, 'and he, too, was emboldened by drink.'

'It's the root of so much crime and evil in this city.'

'Henry went in search of a calash to take him home. Out of the shadows came Signor Maldini, still shaking with fury and demanding satisfaction. He was waving his rapier in the air.'

'Duelling is against the law.'

'That will not prevent it, Jonathan.'

'Did your brother draw?'

'He wore no sword,' said Christopher, 'and even if he had done so, he would have thought twice about taking on a fencing master in a duel. The only way he could defend himself was with his dagger and he remembers taking that out. In fact, it's one of the last things that he does remember.'

'Why?'

'He pa.s.sed out. Whether from drink or fear or a combination of both, he does not know. Henry has a vague memory of a pain at the back of his head before falling to the ground so he might have been struck from behind.'

'By an accomplice of Signor Maldini?'

'Possibly.'

Jonathan pondered. 'It's not a convincing story,' he said at length. 'A man as skilful with a sword as a fencing master would not need a confederate. It would be a matter of pride to him to dispatch an enemy on his own.'

'Yet he left Henry untouched.'

'When did your brother recover his senses?'

'A watchman found him and helped him to his feet,' said Christopher, resuming the tale. 'There was no sign of the Italian. Henry's only concern was to get home safely so the watchman summoned a calash for him. When he got back to Bedford Street, the servants put him to bed.' He pursed his lips. 'They've had plenty of practice at that, I fear.' He tossed the piece of paper on to the table. 'I think I know what you are going to ask me, Jonathan.'

'Where was your brother's dagger?'

'It disappeared along with Signor Maldini.'

'According to the coroner, he was stabbed to death before he went into the river.'

"The dagger was still embedded in his back,' said Christopher. 'It bore my brother's initials and Henry was forced to identify it as his own. Yes,' he continued when he saw the doubt in his friend's eyes, 'I know that it's telling evidence against him but you have to remember the condition that my brother was in at the time.' 'Too sodden with drink to know whether or not he stabbed a man in the back.'

'He'd never do that, Jonathan.'

'Not even in self-defence?'

'What chance would a dagger have against a rapier?'

'Very little if the two men faced each other,' said Jonathan. 'However, if your brother chanced upon his adversary from behind, it would be a different matter.'

'I can see that you're not persuaded of his innocence.'

'I'd need far more evidence to do so.'

'Let me speak to Henry again. Newgate will have jogged his memory.'

'With respect, Mr Redmayne, it would be foolish to rely only on what your brother tells you. Drink befuddled his mind. That much is beyond question. You'll never get the truth out of a man who does not know it himself.'

'So what do you suggest that I do?'

'Speak to the witnesses who were present when the argument flared up. They may be able to shed more light on why your brother and Signor Maldini hated each other so much. Do you have their names?'

'They are here before me,' said Christopher, indicating the piece of paper. 'When I got back from the prison, I made a note of everything that Henry told me, incoherent as it may be. But he did remember who his companions were that night.'

'How many of them were there?'

'Three.'

'Begin there,' counselled Jonathan. 'And when you have finished with his friends, track down this watchman who discovered your brother lying on the ground. He might yield some valuable information.'

Christopher was resolute. 'I'll do all that I can to save Henry,' he affirmed.

'If he is innocent.'

'If he is guilty, he deserves to suffer the full rigour of the law. If my brother killed a man in a drunken brawl, I would hesitate to lift a finger in his defence. But that's not the case, Jonathan,' he argued. 'Henry could not have committed this crime and I'll not rest until I've proved that.' He looked deep into his friend's eyes. 'Will you help me?'

'I am already making enquiries that relate to this investigation.'

'I know,' said Christopher. 'Signor Maldini lodged not far from you. But I would ask you to go further afield. This watchman, for instance. You'll find him much quicker than I would and win his confidence more easily.'

Jonathan was cynical. 'The right coins will do that.'

'I need a partner in this enterprise. I'm too guided by filial love to see everything as clearly as I should. That's why your help would make such a difference, Jonathan. You are cool, detached and objective.'

"There are others with those same qualities.'

'I'm asking you.'

'Then you've come to the wrong man, Mr Redmayne.'

Christopher was hurt. 'Why? We've worked so well together in the past.'

"That was different. We were both of one mind in the past.'

'What are you telling me?'

'What honesty compels me to say,' replied Jonathan uneasily. 'You a.s.sume your brother's innocence but I cannot bring myself to do that. On the face of it, the evidence against him is too strong. He threatened Signor Maldini in the hearing of others, and he had the motive, means and opportunity to carry out that threat. His only defence is that he was too drunk to recall what he did. If you'd heard that excuse offered in court as many times as I have, you'd know how unwise it is to believe it.'

'I thought that I could count on you above all others.' Jonathan's face was impa.s.sive. 'If you are not ready to help me, why did you bother to come?' His visitor averted his gaze. 'Will you proceed on this basis, then?' asked Christopher, anxious to have an ally. 'Work to establish Henry's guilt while I struggle to prove his innocence. We can still carry on side by side. Sooner or later, one of us will have to change his mind.' He knelt before his friend. 'I'd not ask this of anyone else, Jonathan. Help me. Please.'

'Help you to send your brother to the gallows?'

'No,' said Christopher. 'Help me to find the man who did kill Signor Maldini?'