Still the drops of blood showed the way. Rebus had slowed, trying to keep the weight off his twisted ankle, pictures of Jean's face filling his mind. He punched numbers into his mobile, got the sequence wrong the first time and had to start again. When the call was answered, he yelled for assistance.

'I'm keeping the line open,' he said. That way, he could let them know if Devlin suddenly flagged a taxi or boarded a bus.

He could see Devlin again now, but then he turned the corner into Kerr Street. By the time Rebus got to the corner, he'd lost him again. Deanhaugh Street and Raeburn Place were straight ahead, busy with pedestrians and traffic: the evening trawi home. With so many people around, the trail was harder to follow. Rebus crossed the road at the traffic lights and found himself on the road-bridge which crossed the Water of Leith ... There were several routes Devlin could have taken, and the trail seemed to have stopped. Had he crossed towards Saunders Street, or maybe doubled back along Hamilton Place? Resting one arm on the parapet, taking the weight off his ankle, Rebus happened to look down at the river flowing sluggishly below.

And saw Devlin on the footpath, heading down-river towards Leith.

Rebus lifted the phone and called in his position. As he was doing so, Devlin looked back and saw him. The old man's pace quickened, but then suddenly slowed. He came to a stop, the other people on the path making a detour round him. One seemed solicitous, but Devim shook away the offer of help. He turned back and stared at Rebus, who was walking to the end of the bridge, taking the steps down. Devlm hadn't moved. Rebus called in his position again, then put the phone in his pocket, wanting both hands free.

As he walked towards Devlin, he saw the scratches on his face, and realised that Jean had been giving almost as good as she got. Devim was studying his bloodied hand as Rebus stopped six feet away.

382 'The human bite can be quite poisonous, you know,' Deylin told him. 'But at least with Miss Burchill I'm sure I needn't be concerned about hepatitis and HW.' He looked up. 'Something struck me, seeing you on that bridge. I suddenly thought: they don't have anything.'

'What do you mean?'

'Any evidence.'

'Well, we can always make a start with attempted murder.' Rebus slipped a hand into his pocket, brought out the phone.

'Who are you going to call?' Devim asked.

'Don't you want an ambulance?' Rebus held the phone up, took a step forwards.

'Just a couple of stitches,' Devlin commented, examining the wound again. Sweat dripped from his hair and the sides of his face. He was breathing hard, wheezily.

~ou don't make the grade as a serial killer any more, do you, Professor?'

'It's been some time,' he agreed.

'Was Betty-Anne Jesperson the last?'

'I'd nothing to do with young Philippa, if that's what you re asking.'

'Someone stealing your. idea?'

'Well, it wasn't exactly mine in the first place.'

'Are there any others?'

'Others?'

'Victims we don't know about.'

Devlin's smile broke open some of the cuts on his face. 'Isn't four enough?'

~ou tell me.'

'It seemed . .. satisfactory. No pattern, you see. "'wo bodies not even found.'

'Just the coffins.'

'Which might never have been connected . . Rebus nodded slowly, didn't say anything.

'Was it the autopsy?' Devlin asked at last. Rebus nodded again. 'I knew it was a risk.'

'If you'd told us at the start you'd carried out the Glasgow postmortem, we wouldn't have thought anything of it.'

'But back then, I couldn't know what else you might find. Other connections, I mean. And by the time I saw you weren't going to come up with anything, it was too late. I could hardly say "Oh, 383 incidentally, I was one of the pathologists", not after we'd already been through the notes...'

He dabbed at his face with his fingers, finding blood issuing from the cuts. Rebus held the phone a little closer.

'That ambulance .. .?' he offered.

Devlin shook his head. 'In good time.' A middle-aged woman made to pass them, eyes widening in horror as she saw Devlin. 'A stumble down the steps,' he reassured her. 'Help is on its way.'

She quickened her pace away from the scene.

'I think I've said more than enough, don't you, DI Rebus?'

'Not for me to say, sir.'

'I do hope DS Wylie doesn't get into trouble.'

'For what?'

'Not keeping a closer eye on me when I was studying the autopsy reports.'

'I don't think she's the one that's in trouble here.'

'Uncorroborated evidence, isn't that what we're dealing with, Inspector? One woman's word against mine? I'm sure I can find some plausible motive for my fight with Miss Burchill.' He studied his hand. 'One might almost call me the victim. And let us be honest, what else do you have? Two drownings, two missing persons, no evidence.'

'Well,' Rebus corrected him, 'no evidence apart from this.' He held the phone a little higher. 'It was already on when I took it from my pocket, connected to our comms centre down in Leith.' He put the phone to his ear. Glancing back over his shoulder, he saw that uniformed officers were making their way down the steps from the bridge. 'Did you get all that?' he asked into the mouthpiece. Then he looked at Devlin and smiled.

'We record every call, you see.'

The animation left Devlin's face, his shoulders slumping. Then he turned on his heels, preparing to run. But Rebus's arm snaked out, gripping him hard by the shoulder. Devlin tried to wrestle free. One foot slipped off the walkway and he started to fall, his weight pulling Rebus with him. The two men landed heavily in the Water of Leith. It wasn't deep, and Rebus felt his own shoulder connect with a rock. When he tried standing up, his feet sank to the ankles in mud. He was still holding on to Devlin, and as the bald head appeared from below the surface, missing its spectacles, Rebus saw again the monster who had battered Jean. He reached out his free hand to the Professor's neck and forced him back under. Hands flew 384 up, splashing, wrestling air. Fingers clawing at Rebus's arm, clutching at his jacket lapel.

He felt as calm as he ever had in his life. The water lapped around him, icy but somehow soothing, too. There were people on the bridge, staring down, and officers wading into the water nearby, and a pale-lemon sun spectating from above a bruised cloud. The water seemed cleansing to him. He couldn't feel his twisted ankle any more, couldn't feel anything much. Jean would recover, and so would he. He'd move out of Arden Street, find somewhere else, somewhere nobody knew about ... maybe near water.

His arm was wrenched from behind: one of the uniforms.

'Let go of him!'

The cry broke the spell. Rebus released his grip, and Donald Devlin rose spluttering and choking into the daylight, watery vomit dribbling from his chin ...

They were loading Jean Burchill into the ambulance when Rebus's mobile started ringing. One of the green-suited paramedics was explaining that they couldn't rule out spinal or neck damage, which was why they'd strapped her to a stretcher and placed braces around her head and neck.

Rebus was staring at Jean, trying to take in what was being said.

'Shouldn't you answer that?' the paramedic asked.

'What?'

~our phone.'

Rebus lifted the mobile to his ear. When he'd struggled with Devlm, it had dropped on to the walkway. It was scratched and chipped, but at least still working. 'Hello?'

'DI Rebus?'

'It's Eric Bain here.'

'Is something the matter?'

'Quite a lot, yes.' As the trolley slid home into the back of the ambulance, Rebus looked down at his sodden clothes. 'Any sign of Siobhan?'

'That's why I'm calling.'

'What's happened?'

'Nothing's happened. It's just that I can't reach her. They think she's in the Botanics. There are half a dozen men out there looking for her.'

385.

'So?'

'So there's news about Quizmaster.'

'And you're bursting to tell someone?'

'I suppose so, yes.

'I'm not sure you've got the right person, Bain, I'm a bit tied up right now.

'Oh.'

Rebus was inside the ambulance now, seated across from the trolley. Jean had her eyes closed, but when he reached for her hand, his pressure was returned.

'Sorry?' he said, having missed what Bain had just said.

'Who should I tell then?' Bain repeated.

'I don't know.' Rebus sighed. 'Okay, tell me what it is.'

'It's Special Branch,' Bain said, the words streaming out. 'One of the e-mail addresses Quizmaster was using, it traces back to Philippa Balfour's account.'

Rebus didn't understand: was Bain trying to say that Flip Balfour had been Quizmaster ...?

'I think it makes sense,' Bain was saying now. 'Taken with Claire Benzie's account.'

'I'm not getting you.' Jean's eyelids were fluttering. A sudden jolt of pain, Rebus guessed. He lessened the pressure on her hand.

'If Benzie did lend her laptop to Philippa Balfour, we've got two computers in the same place, both used by Quizmaster.'

'And if we rule out Ms Balfour as a suspect 'We're left with someone who had access to both?' Silence for a moment, and then Bain: 'I think the boyfriend's back in the frame, don't you?'

'I don't know.' Rebus was having trouble concentrating. He ran the back of his hand across his forehead, feeling perspiration there.

'We could always ask him ...

'Siobhan's gone to meet Quizmaster,' Rebus said. Then he paused. 'She's at the Botanics, you say?'

'How do we know?'

'Her car's parked right outside.'

Rebus thought for a second: Siobhan would know they were looking for her. Leaving the car in full view was too big a giveaway...

'What if she's not there?' he said. 'What if she's meeting him somewhere else?'

386 'How can we find out?'

'Maybe Costello's flat...' He looked down at Jean. 'Look, Bain, I really can't do this ... not right now.'

Je~m's eye opened. She mouthed something.

'Hang on, Bain,' Rebus said. Then he lowered his head to Jean's.

'Fine .. .' he heard her slur.

She was telling him she'd be okay; that he had to help Siobhan now. Rebus turned his head, his eyes meeting those of Ellen Wylie, who was standing on the roadway, waiting for the doors to close. She nodded slowly, letting him know she'd stay with Jean.

'Bain?' he said into the mobile. 'I'll meet you outside Costello's flat.'

By the time Rebus got there, Bain had climbed the winding stairs and was standing outside Costello's door.

'I don't think he's home,' Bain was saying, crouching down to look through the letter-box. A chill ran up Rebus's spine, remembering what he'd seen when he'd peered into Devlin's flat. Bain got to his feet again. 'No sign of ... Jesus Christ, man, what happened to you?'

'Swimming lessons. I didn't have time to change.' Rebus looked at the door, then at Bain. 'Together?' he said.

Bain stared back at him. 'Isn't that illegal?'

'For Siobhan,' Rebus said simply.

They hit the door together on the count of three.

Inside, Bain knew what he was looking for: a computer. He found two in the bedroom, both of them laptops.

'Claire Benzie's,' Bain guessed, 'and either his own or someone else's.'