I'm not sure she saw any of us in a decent light. Barney Byars was doing elephant impressions, you know, where you pull out your trouser pockets and-'

'Yes, I know.'

'Well, Helen took it in good enough part, but all the same…"

'Nice girl, isn't she?'

'The sort my mum would have wanted me to marry.'

Mine too, thought Rebus. The whisky wasn't just loosening Jack's tongue, it was also loosening his accent. The polish was fading fast, leaving the raw wood of towns like Kirkcaldy, Leven, Methil.

'This party was a couple of weeks ago, wasn't it?'

'Three weeks ago. We were back here five days when Liz decided she needed a holiday. Packed a case and off she went. Never saw her again…" He raised a fist and punched the soft leather of the sofa, making hardly a sound and no discernible mark. 'Why are they doing this to me? I'm the best MP this constituency's ever had. Don't take my word for it. Go out and talk to them. Go to a mining village or a farm or a factory or a fucking afternoon tea party. They tell me the same thing: well done, Gregor, keep up the good work.' He was on his feet again now, feet holding their ground but the rest of the body in motion. 'Keep up the good work, the hard work. Hard work! It bloody is hard work, I can tell you.' His voice was rising steadily. 'Worked my balls off for them! Now somebody's trying to piss on my whole life from a very high place. Why me? Why me? Liz and me… Liz…"

Urquhart tapped twice before putting his head round the door. 'Everything all right?'

Jack put on a grotesque mask of a smile. 'Everything's fine, Ian. Listening behind the door, are you? Good, wouldn't want you to miss a word, would we?'

Urquhart glanced at Rebus. Rebus nodded: everything's okay in here, really it is. Urquhart retreated and closed the door. Gregor Jack collapsed into the sofa. I'm making such a mess of everything,' he said, rubbing his face with his hand, 'Ian's such a good friend…'

Ah yes, friends.

'I believe,' said Rebus, 'that you haven't just been receiving anonymous calls.' '

'What?'

'Someone said something about letters, too.'

'Oh… oh yes, letters. Crank letters.'

'Do you still have them?'

Jack shook his head. 'Not worth keeping.'

'Did you let anyone see them?'

'Not worth reading.'

'What exactly was in them, Mr Jack?'

'Gregor,' Jack reminded him. 'Please, call me Gregor. What was in them? Rubbish. Garbled nonsense. Ravings…'

'I don't think so.'

'What?'

'Someone told me you'd refuse to let anyone open them. He thought they might be love letters.'

Jack hooted.' Love letters!'

'I don't think they were either. But it strikes me, how could Ian Urquhart or anyone else know which letters they were to hand to you unopened? The handwriting? Difficult to tell though, isn't it? No, it had to be the postmark. It had to be what was on the envelope. I'll tell you where those letters came from, Mr Jack. They came from Duthil. They came from your old friend Andrew Macmillan. And they weren't raving, were they? They weren't garbled or nonsense or rubbish. They were asking you to do something about the system in the special hospitals. Isn't that right?'

Jack sat and studied his glass, mouth set petulantly, a kid who's been caught out.

'Isn't that right?'

Jack gave a curt nod. Rebus nodded, too. Embarrassing to have a sister who's a prostitute. But how much more embarrassing to have an old friend who's a murderer? And mad, to boot. Gregor Jack had worked hard to form his public image, and harder still to preserve it. Rushing around with his vacuously sincere grin and strong-enough-for-the-occasion handshake. Working hard in his constituency, working hard in public. But his private life… well, Rebus wouldn't have wanted to swap. It was a mess. And what made it so messy was that Jack had tried to hide it. He didn't have skeletons in his closet; he had a crematorium.

'Wanted me to start a campaign,' Jack was muttering. 'Couldn't do that. Why did you start this crusade, Mr Jack? To help an old friend. Which old friend is that, Mr Jack? The one who cut his wife's head off. Now, if you'll excuse me. Oh, and please remember to vote for me next time round…' And he began a drunken, wailing laugh, near-manic, near-crying. Finally actually becoming crying, tears streaming down his cheeks, dripping into the glass he still held.

'Gregor,' Rebus said quietly. He repeated the name, and again, and again, always quietly. Jack sniffed back more tears and looked blurrily towards him. 'Gregor,' said Rebus, 'did you kill your wife?'

Jack wiped his eyes on his shirt-sleeve, sniffed, wiped again. He began to shake his head.

'No,' he said. 'No, I didn't kill my wife.'

No, because William Glass killed her. He killed the woman under Dean Bridge, and he killed Elizabeth Jack.

Rebus had missed all the excitement. He had driven back into town unaware of it. He had climbed the steps up to Great London Road station without knowing. And he had entered a place of jumpy, jittery clamour. Christ, what did it mean? Was the station definitely staying open? No move to St Leonard 's? Which meant, if he remembered his bet, that he'd set up home with Patience Aitken. But no, it was nothing to do with the station staying open or being reduced to rubble. It was William Glass. A beat constable had come across him sleeping amidst the dustbins behind a supermarket in Barnton. He was in custody. He was talking. They were feeding him soup and giving him endless cups of tea and fresh cigarettes, and he was talking.

'But what's he saying?'

'He's saying he did them – both of them!'

'He's saying what?'

Rebus started calculating. Barnton… not so far from Queensferry when you thought about it. They were thinking he'd have headed north or west, but in fact he'd started crawling back into town… supposing he'd ever got as far as Queensferry in the first place.

'He's admitting both murders.'

'Who's with him?'

'Chief Inspector Lauderdale and Inspector Dick.'

Lauderdale! Christ, he'd be loving it. This would be the making of him, the final nail in the Chief Super's coffee-maker. But Rebus had other things to be doing. He wanted Jack's sister found, for a start. Gail Jack, but she wouldn't be calling herself that, would she? He went through the Operation Creeper case-notes. Gail Crawley. That was her. She'd been released, of course. And had given a London address. He found one of the officers who'd interviewed her.

'Yes, she said she was heading south. Couldn't keep her, could we? Didn't want to either. Just gave her a kick up the arse and told her not to come back up here again. Isn't it incredible? Catching Glass like that!'

'Incredible, yes,' said Rebus. He photocopied what notes there were, along with Gail Crawley's photograph, and scribbled some further notes of his own on to the copy. Then he telephoned an old friend, an old friend in London.

'Inspector Flight speaking.'

'Hello George. When's the retirement party then?'

There was laughter. 'You tell me, you were the one who persuaded me to stay on.'

'Can't afford to lose you.'

'Meaning you want a favour?'

'Official business, George, but speed is of the -'

'As usual. All right, what is it?'

'Give me your fax number and I'll send you the details. If she's at the address, I'd like you to talk to her. I've put down a couple of phone numbers. You can reach me anytime on one or the other.'

'Two numbers, eh? Got yourself in deep, have you?'

In deep… jettisoning what I don't need…

'You could say that, George.'

'What's she like?' By which he meant Patience, not Gail.

'She likes domesticity, George. Pets and nights in, candles and firelight.'

'Sounds perfect.' George Flight paused. I'll give it three months max.'