St Leonard's police station, headquarters of the city's B Division, boasted a semi-permanent Murder Room. The present inquiry looked like it had been going on forever. Abernethy seemed to favour the scene. He browsed among the computer screens, telephones, wall charts and photographs. Kilpatrick touched Rebus's arm.

'Keep an eye on him, will you? I'll just go say hello to your Chief Super while I'm here.’

'Right, sir.’

Chief Inspector Lauderdale watched him leave. 'So that's Kilpatrick of the Crime Squad, eh? Funny, he looks almost mortal.’

It was true that Kilpatrick's reputation – a hard one to live up to – preceded him. He'd had spectacular successes in Glasgow, and some decidedly public failures too. Huge quantities of drugs had been seized, but a few terrorist suspects had managed to slip away.

'At least he looks human,' Lauderdale went on, 'which is more than can be said for our cockney friend.’

Abernethy couldn't have heard this – he was out of earshot – but he looked up suddenly towards them and grinned. Lauderdale went to take a phone call, and the Special Branch man sauntered back towards Rebus, hands stuffed into his jacket pockets.

'It's a good operation this, but there's not much to go on, is there?’

'Not much.’

'Not yet.’

'You worked with Scotland Yard on a case, didn't you?’

'That's right.’

'With George Flight?’

'Right again.’

'He's gone for retraining, you know. I mean, at his age. Got interested in computers, I don't know, maybe he's got a point. They're the future of crime, aren't they? Day's coming, the big villains won't have to move from their living rooms.’

'The big villains never have.’

This earned a smile from Abernethy, or at least a lopsided sneer. 'Has my minder gone for a jimmy?’

'He's gone to say hello to someone.’

'Well tell him ta-ta from me.’

Abernethy looked around, then lowered his voice. 'I don't think DCI Kilpatrick will be sorry to see the back of me.’

'What makes you say that?’

Abernethy chuckled. 'Listen to you. If your voice was any colder you could store cadavers in it. Still think you've got terrorists in Edinburgh?’

Rebus said nothing. 'Well, it's your problem. I'm well shot of it. Tell Kilpatrick I'll talk to him before I head south.’

'You're supposed to stay here.’

'Just tell him I'll be in touch.’

There was no painless way of stopping Abernethy from leaving, so Rebus didn't even try. But he didn't think Kilpatrick would be happy. He picked up one of the phones. What did Abernethy mean about it being Rebus's problem? If there was a terrorist connection, it'd be out of CID's hands. It would become Special Branch's domain, MI5's domain. So what did he mean? He gave Kilpatrick the message, but Kilpatrick didn't seem bothered after all. There was relaxation in his voice, the sort that came with a large whisky. The Farmer had stopped drinking for a while, but was back off the wagon again. Rebus wouldn't mind a drop himself…

Lauderdale, who had also just put down a telephone, was staring at a pad on which he'd been writing as he took the call.

'Something?’ Rebus asked.

'We may have a positive ID on the victim. Do you want to check it out?’

Lauderdale tore the sheet from the pad.

'Do Hibs fans weep?’ Rebus answered, accepting it.

Actually, not all Hibs fans were prone to tears. Siobhan Clarke supported Hibernian, which put her in a minority at St Leonard's. Being English-educated (another minority, much smaller) she didn't understand the finer points of Scottish bigotry, though one or two of her fellow officers had attempted to educate her. She wasn't Catholic, they explained patiently, so she should support Heart of Midlothian. Hibernian were the Catholic team. Look at their name, look at their green strip. They were Edinburgh's version of Glasgow Celtic, just as Hearts were like Glasgow Rangers.

'It's the same in England,' they'd tell her. 'Wherever you've got Catholics and Protestants in the same place.’

Manchester had United (Catholic) and City (Protestant), Liverpool had Liverpool (Catholic) and Everton (Protestant). It only got complicated in London. London even had Jewish teams.

Siobhan Clarke just smiled, shaking her head. It was no use arguing, which didn't stop her trying. They just kept joking with her, teasing her, trying to convert her. It was light-hearted, but she couldn't always tell how lighthearted. The Scots tended to crack jokes with a straight face and be deadly serious when they smiled. When some officers at St Leonard's found out her birthday was coming, she found herself unwrapping half a dozen Hearts scarves. They all went to a charity shop.

She'd seen the darker side of football loyalty, too. The collection tins at certain games. Depending on where you were standing, you'd be asked to donate to either one cause or the other. Usually it was for 'families' or 'victims' or 'prisoners' aid', but everyone who gave knew they might be perpetuating the violence in Northern Ireland. Fearfully, most gave. One pound sterling towards the price of a gun.

She'd come across the same thing on Saturday when, with a couple of friends, she'd found herself standing at the Hearts end of the ground. The tin had come round, and she'd ignored it. Her friends were quiet after that.

'We should be doing something about it,' she complained to Rebus in his car. 'Such as?’

'Get an undercover team in there, arrest whoever's behind it.’

'Behave.’

'Well why not?’

'Because it wouldn't solve anything and there'd be no charge we could make stick other than something paltry like not having a licence. Besides, if you ask me most of that cash goes straight into the collector's pocket. It never reaches Northern Ireland.’

'But it's the principle of the thing.’

'Christ, listen to you.’

Principles: they were slow to go, and some coppers never lost them entirely. 'Here we are.’

He reversed into a space in front of a tenement block on Mayfield Gardens. The address was a top floor flat.

`Why is it always the top floor?’ Siobhan complained.

'Because that's where the poor people live.’

There were two doors on the top landing. The name on one doorbell read MURDOCK. There was a brown bristle welcome-mat just outside the door. The message on it was GET LOST!

'Charming.’ Rebus pressed the bell. The door was opened by a bearded man wearing thick wire-framed glasses. The beard didn't help, but Rebus would guess the man's age at mid-twenties. He had thick shoulder-length black hair, through which he ran a hand.

'I'm Detective Inspector Rebus. This is 'Come in, come in. Mind out for the motorbike.’

'Yours, Mr Murdock?’

`No, it's Billy's. It hasn't worked since he moved in.’

The bike's frame was intact, but the engine lay disassembled along the hall carpet, lying on old newspapers turned black from oil. Smaller pieces were in polythene bags, each bag tied at the neck and marked with an identifying number.

'That's clever,' said Rebus.

'Oh aye,' said Murdock, 'he's organised is Billy. In here.’

He led them into a cluttered living area. 'This is Millie, she lives here.’

'Hiya.’

Millie was sitting on the sofa swathed in a sleeping bag, despite the heat outside. She was watching the television and smoking a cigarette.

'You phoned us, Mr Murdock.’

'Aye, well, it's about Billy.’

Murdock began to pad around the room. 'See, the description in the paper and on the telly, well… I didn't think about it at the time, but as Millie says, it's not like Billy to stay away so long. Like I say, he's organised. Usually he'd phone or something, just to let us know.’

'When did you last see him?’

Murdock looked to Millie. 'When was it, Thursday night?’