Thursday morning. A week since the body had been found.

He woke up early, but was in no hurry to rise, and this time he let Mrs Wilkie bring him his tea in bed. She'd had a good night, never once thinking him her long-dead husband or long-lost son, so he reckoned she deserved not to be kept out of the bedroom. Not only tea this morning, but ginger nuts, too. And the tea was hot. But the day was cool, still grey and drizzly. Well, never mind. He'd be heading back to civilization, just as soon as he'd paid his respects elsewhere.

He ate a hurried breakfast, and received a peck on the cheek from Mrs Wilkie before leaving.

'Come back again some time,' she called, waving to him from the door. 'And I hope the jam sells all right…'

The rain came on at its heaviest just as his windscreen wipers gave up. He stopped the car to study his map, then dashed outside to give the wipers a quick shake. It had happened before: they just stuck, and could be righted with a bit of force. Except this time they really had packed in. And not a garage in sight. So he drove slowly, and found after a while that the heavier the rain fell, the clearer his windscreen became. It was the slow fine rain that was the problem, blotting out all but the vaguest shapes and outlines. The heavy dollops of rain came and went so fast that they seemed to clear the windscreen rather than obscuring it.

Which was just as well, for the rain stayed heavy all the way to Duthil.

Duthil Special Hospital had been planned and built to act as a showpiece for treatment of the criminally insane. Like the other 'special hospitals' dotted around the British Isles, it was just that – a hospital. It wasn't a prison, and patients who arrived in its care were treated like patients, not prisoners. Treatment, not punishment, was its function, and with the brand new buildings came up-to-date methods and understandings.

All this the hospital's medical director, Dr Frank Forster, told Rebus in his pleasant but purposeful office. Rebus had spent a long time last night on the telephone with Patience, and she'd told him much the same thing. Fine, thought Rebus. But it was still a place of detention. The people who came here came with no time limit attached, no 'sentence' that had to be served. The main gates were operated electronically and by guards, and everywhere Rebus had gone so far the doors had been locked again behind him. But now Dr Forster was talking about recreation facilities, staff/patient ratios, the weekly disco… He was obviously proud. He was also obviously overdoing it. Rebus saw him for what he was: the front-man whose job it was to publicize the benefits of this particular special hospital, the caring attitude, the role of treatment. The likes of Broadmoor had come in for a lot of criticism in previous years. To avoid criticism, you needed good PR. And Dr Forster looked good PR. He was young for a start, a good few years younger than Rebus. And he had a healthy, scrupulous look to him, with a smile always just around the corner.

He reminded Rebus of Gregor Jack. That enthusiasm and energy, that public image. It used to be the sort of stuff Rebus associated with American presidential campaigns; now it was everywhere. Even in the asylums. The lunatics hadn't taken over; the image-men had.

'We have just over three hundred patients here,' Forster was saying, 'and we like the staff to get to know as many of them as possible. I don't just mean faces, I mean names. First names at that. This isn't Bedlam, Inspector Rebus. Those days are long past, thank God.'

'But you're a secure unit.'

'Yes.'

'You deal with the criminally insane.'

Forster smiled again. 'You wouldn't know it to look at most of our patients. Do you know, the majority of them – over sixty per cent, I believe – have above-average IQs? I think some of them are brighter than I am!' A laugh this time, then the serious face again, the caring face. 'A lot of our patients are confused, deluded. They're depressed, or schizophrenic. But they're not, I assure you, anything like the lunatics you see in the movies. Take Andrew Macmillan, for example.' The file had been on Forster's desk all along. He now opened it. 'He's been with us since the hospital opened. Before that, he was in much less… savoury surroundings. He was making no progress at all before he came here. Now, he's becoming more talkative, and he seems about ready to participate in some of the available activities. I believe he plays a very good game of chess.'

'But is he still dangerous?'

Forster chose not to answer. 'He suffers occasional panic attacks… hyperventilation, but nothing like the frenzies he went into before.' He closed the file. 'I would say, Inspector, that Andrew Macmillan is on his way to a complete recovery. Now, why do you want to talk to him?'

So Rebus explained about The Pack, about the friendship between 'Mack' Macmillan and Gregor Jack, about Elizabeth Jack's murder and the fact that she had been staying not forty miles from Duthil.

I just wondered if she'd visited.'

'Well, we can check that for you.' Forster was flipping through the file again. 'Interesting, there's nothing in here about Mr Macmillan knowing Mr Jack, or about his having that nickname. Mack, did you say?' He reached for a pencil. I'll just make a note…" He did so, then flicked through the file again. 'Apparently, Mr Macmillan has written to several MPs in the past… and to other public figures. Mr Jack is mentioned…" He read a little more in silence, then closed the file and picked up the telephone. 'Audrey, can you bring me the records of recent visitors… say in the last month? Thanks.'

Duthil wasn't exactly a tourist attraction, and, out of sight being out of mind, there were few enough entries in the book. So it was the work of minutes to find what Rebus was looking for. The visit took place on Saturday, the day after Operation Creeper, but before the story became public knowledge.

'"Eliza Ferrie,'" he read. '"Patient visited: Andrew Macmillan. Relation to patient: friend." Signed in at three o'clock and out again at four thirty."

'Our regular visiting hours,' Forster explained. 'Patients can have visitors in the main recreation room. But I've arranged for you to see Andrew in his ward.'

'His ward?'

'Just a large room, really. Four beds to a room. But we call them wards to enforce… perhaps enhance would be a better word… to enhance the hospital atmosphere. Andrew's in the Kinnoul Ward.'

Rebus started.' Why Kinnoul?'

'Pardon?'

'Why call the ward Kinnoul?'

Forster smiled. 'After the actor. You must have heard of Rab Kinnoul? He and his wife are among the hospital's patrons.'

Rebus decided not to say anything about Cath Kinnoul being one of The Pack, about her having known Macmillan at school… It was no business of his. But the Kinnouls went up in his estimation; well, Cath did. She had not, it seemed, forgotten her one-time friend. Nobody calls me Gowk any more. And Liz Jack, too, had visited, albeit under her maiden name and with a twist to her Christian name to boot. He could understand that: the papers would have had a field day. MP's Wife's Visits to Crazed Killer. All those possessives. She couldn't have known that the papers were about to have their story anyway…

'Perhaps at the end of your visit,' Dr Forster said, 'you'd like to see some of our facilities? Pool, gym, workshops…'

'Workshops?'

'Simple mechanics. Car maintenance, that sort of thing.'

'You mean you give the patients spanners and screwdrivers?'

Forster laughed. 'And we count them in again at the end of the session.'

Rebus had thought of something. 'Did you say car maintenance? I don't suppose somebody could take a look at my windscreen wipers?'

Forster started to laugh again, but Rebus shook his head.

I'm serious,' he said.