‘The case he’d been working on. Of course. The break-in at the Metropolitan museum. He was getting close to finding out what it was all about and your employer needed to stop him.’ He considered other facts. ‘And Amelia too. Because she’d taken over the Met case … But you’re admitting it all now,’ Rhyme said slowly, troubled. ‘Why?’

‘I think I’ll let it go at that, Lincoln. Probably not good to say much more. But I will tell you that nobody is at risk anymore. Amelia’s safe. The only reason to poison her or Ron or your brilliant nerdy assistant, Mel Cooper, would be to shift the blame to the AFFC. And obviously that’s pointless now. Besides, I’ve changed tack.’

Rhyme pictured the man shrugging.

‘You’re safe too, of course. You always have been.’

Always have been?

Rhyme gave a laugh. ‘The anonymous phone call about somebody’s breaking into my town house through the back door. When Billy snuck in to poison my whisky. That was you.’

‘I was keeping tabs on him. The night he went to your town house, I was following. He wasn’t supposed to kill you, hurt you in any way. When he changed into a workman’s uniform and got a needle ready, I knew what he was up to.’

This made no sense at all.

Until a moment later another deduction. Rhyme whispered, ‘You need me for something. You need me alive. Why? To investigate a crime, of course. Yes, yes. But which one? One committed recently?’ What open major cases were there? Rhyme wondered. Then realized. ‘Or one that’s going to happen? Next week?’

‘Or next month or next year,’ the Watchmaker offered, sounding amused.

‘The Metropolitan museum break-in? Or something else?’

No word.

‘Why me?’

A pause. ‘I’ll just say that the plan I’ve put together needs you.’

‘And it needs me to be aware of it,’ Rhyme shot back. ‘So my knowing is a gear or a spring or a flywheel in your timepiece.’

A laugh. ‘How well put. It’s so refreshing to talk to somebody who gets it … But now I should be going, Lincoln.’

‘One last question?’

‘Of course. Answering may be a different matter.’

‘You told Billy to find that book, Serial Cities.’

‘That’s right. I needed to make sure he and the Stantons appreciated how good you were – and how much you and Amelia had learned about the militias and their tactics.’

Rhyme said ruefully, ‘You had no particular interest in the Bone Collector? I got that wrong.’

‘I guess you did.’

A laugh and Rhyme said, ‘So the connection I found between the Bone Collector and you wasn’t there at all?’

A pause.

‘You found a connection between us?’ The Watchmaker sounded curious.