'And does it suggest anything? About the attacker, I mean?'

'Aside from the fact that he was scrupulous, meticulously careful?'

'Aside from that.'

One of the overhead lights was buzzing slightly; barely diluted, the smell of chemicals permeated the room.

'Anything I say would be purely speculation. If anything, this sort of conjecture is far more your field than mine.'

'Feel free to speculate away.'

'Very well. It might suggest someone who, by instinct or by training, is highly methodical. Who, even though capable of great anger, is, nonetheless, able to exert an unusual degree of self-control.'

'You're thinking of the rape, the nature of the wounds?'

'Indeed.'

'The rape itself, it took place while the victim was still alive?'

'I've no reason to believe otherwise. All the signs of non-consensual intercourse were present – bruising, tearing. No semen, of course. Presumably a condom.'

'And the weapon that killed her?'

'Let's just take a look.' He reached for a set of photographs from a drawer. 'Some of the wounds, here on the arm, for instance, are slash wounds. Quite long, you see, but not so deep. Look at the tail there, indicating the angle of the blow, from above.'

'Tall, then? Whoever this was? Taller than her.'

'It's possible. But far from certain. She could have been falling, have been on her knees, he could have been standing above her. A host of permutations, I'm afraid.'

'And these?' Elder asked, pointing to the torso.

'Stab wounds. Quite different, almost certainly fatal. Both of them deep. And see here, where the opening of the wound is wider than the blade, the knife has been levered forward and back before being withdrawn.'

'What about the knife itself?'

'The blade was single-edged, you can tell from the square termination on the underside of the wound. To achieve this degree of penetration, almost certainly sharp at the tip. I should say a minimum of twenty centimetres in length, a good couple of centimetres across at the widest point.'

'A butcher's knife?'

'That sort of thing.'

Elder looked at the photographs. Extreme anger and control. The ability to switch between the two. Facility, maybe that was a better word. He talked with the pathologist for perhaps ten minutes more, without anything new surfacing.

'Good luck, Mr Elder.' When he bade him goodbye, the pathologist's hand was smooth and cold like porcelain.

On his way back down the hill, Elder stopped outside one of several charity shops and browsed through two boxes of books. Tom Clancy. Jeffrey Archer. Several women called Maeve. No matter, he still had another hundred or so pages of his Patrick O'Brian to go.

19

There was a photograph of Maddy Birch on the wall, staring back at the camera, unsmiling; recent, Elder assumed, lines on her face she'd not have liked, the odd grey hair.

Neither Karen Shields nor Mike Ramsden was on the premises; the message Karen had left was vague, they might be back, they might not.

A detailed map showed where Maddy's body had lain, where her clothing, her possessions had been found. Elder remembered standing there that morning, the relative quiet in the midst of so much inner-city activity and noise; imagined it again as it would have been that night, that evening. Maddy waiting, shifting her sports bag from one shoulder to the other, glancing again at her watch, the hands luminous in the half-dark.

Elder looked at the photographs once more, Polaroids taken at the scene. Maddy's arms were bare. No watch.

DS Sheridan was ensconced behind several hundred megabytes of PC.

'Sherry,' Elder said, 'disturb you for a minute?'

Sheridan pressed 'save', removed his glasses and blinked. 'Go ahead.'

'Her watch. Maddy's watch. Was she wearing one that evening? Do we know?'

Sheridan shook his head. 'Nothing listed as far as I can remember. I can check, but no, I'm pretty certain.'

'How many officers do you know,' Elder said, 'who don't wear a watch?'

'Not to say she wore one off duty.'

'In which case she'd have left it at home. The stuff that was in her flat, where's it all now?'

'As far as I know, everything was packed up and sent to her mother.'

'But there'll be an inventory?'

Sheridan nodded towards the computer. 'On here somewhere.'

'Check it out for me, would you? And maybe you could pass a message to double-check with the mother?'

'Will do.'

'Oh, and Sherry, one other thing. Maddy's arrest record. Anyone who's been inside and recently released. That's been checked, I suppose?'

Sheridan nodded. 'One of the first things we did. Not sure offhand how far back we went, though. I can get you a list.'

'Thanks. Let's make sure we looked at Lincoln as well. Someone she put down for a long stretch, maybe, who might have had reason to feel aggrieved, bear a grudge.'

'Okay.'

'Thanks, Sherry.' Elder rested a hand briefly on his shoulder. Get the wrong side of the office manager, he knew, and you were pushing a boulder uphill from day one.

Steve Kennet was four storeys up, sitting astride a roof beam atop one of those late-Victorian semi-detached houses that, in Dartmouth Park, fetched upwards of a million and a quarter pounds, a million and a half. Elder shouted upwards, raising his voice above the distortions of a small transistor radio that was dangling from the scaffolding. After several moments of misunderstanding, Kennet came down cheerfully enough, wiping his hands on a piece of towel hanging from his belt.

'How's it going?' Elder asked, nodding back up.

Kennet's smile was honest and open. 'Should've been finished well before Christmas. Would have been if not for the weather. Two blokes I work with've already started on another place up Highgate Hill. Part of the old hospital. Turning it into flats.'

'You don't mind if I ask you a few questions about Maddy?'

'Still got nobody, huh?'

'Not yet.'

Kennet cleared his throat of dust and spat neatly into the side of the road. 'Go ahead.'

Before sitting on the low wall outside the house, Kennet took a slender pouch of tobacco from the back pocket of his jeans, a packet of papers from the top pocket of his plaid shirt. His face and the backs of his hands were streaked with dirt and dust.

Elder sat down alongside him.

On the opposite side of the street, a young au pair went by pushing a small child in a buggy, talking excitedly into her mobile phone in a language Elder didn't understand.

Methodically, Kennet began to roll a cigarette.

'Maddy, how did you meet her?' Elder asked.

'Usual way, in a pub. Holloway. She was there with that pal of hers. Vanessa. To be honest, that's who I was interested in first off. Vanessa. You've met her?'

Elder nodded.

'Then you'll know what I mean.' Kennet wet the edge of the paper with his tongue. 'Up front, I s'pose that's what you'd say. Not shy about coming forward.' When his lighter didn't work first time, he gave it a quick shake. 'I was with a mate. We went over and sat with them. His idea, really. After a bit, my mate drifted off. Vanessa, she was dead lively – she'd had a few, I dare say – whereas Maddy, mostly she was just sitting there, smiling a little, you know, not unfriendly, but not – what could I say? – obvious. What she was after.'

'And you liked that?' Elder said.

Kennet grinned. 'S'pose I did. What bloke wouldn't? End of the evening I got both their numbers, but it was Maddy I called. She seemed surprised, I remember that. Thought I'd made a mistake, got the numbers mixed up.'

'And you went out with her for how long?'