Accountants, you can keep 'em,' said Garnett. 'We're not coppers to them any more, just a load of figures on a sheet of paper. It's all flashy operations and clear-up rates. There's no room for old-style coppers these days.’

He threw a bitter glance along the hillside towards where the Task Force squad was beating its way through the scrubland beyond a row of Lombardy poplars like a set of dark spikes dropped into the landscape.

‘Of course, you'll know all about that, lad. You're different. A chip off the old block, they reckon. Good for you. Wish you luck, though.'

‘Yeah, thanks.’

Cooper had only just returned from a fortnight's summer leave. On his first day back on duty he had been thrown straight into the search for Laura Vernon, fifteen years old and missing from home since Saturday night. They were looking for a girl with short dark hair dyed red, wearing a silver nose stud, five foot six inches tall, mature for her age. Failing that, they were looking for her clothes — black denims, a red short-sleeved cotton T-shirt, a white sports bra, blue bikini pants, blue ankle socks, a pair of Reeboks, size-five, slim-fit. Nobody thought it necessary to point out that if they found her clothes, they were also looking for a body.

‘This lass, though. She's miles away, if you ask me,' said Garnett. 'Run off with the boyfriend. Some yob on a motorbike from Manchester, maybe. That's what teenage girls get up to these days. The schools teach them about contraceptives before they're twelve, so what can you expect? 'Course, the parents never have a clue. Not parents like this lot, anyway. They don't know the kids exist half the time.’

Cooper's legs were still aching from the rock climbing he had done on the sheer, terrifying faces of the Cuillin Hills of Skye. His friends Oscar and Rakesh were members of the Edendale Mountain Rescue Team and could never get enough of the mountains. Just now, though, he could really have done with a quiet day behind his desk at Division, making a few phone calls maybe, catching up on what had been happening during the last fortnight, getting up to date with the gossip. Anything but clambering up and down another hillside.

But he knew this area well — he was himself from a village a few miles down the valley. Most of the men recruited for the search parties were from the section stations, or even from out of the division. A few of them were city boys. On the hills around here they would be falling down old mine shafts in their dozens without someone to tell them which way was up and which was down.

And, of course, PC Garnett could well be right. It had happened so often — youngsters bored with life in the villages of the Peak District, attracted by the glamour and excitement of the big cities. And very likely there was a boyfriend, too — no doubt someone the parents found unsuitable. According to the initial reports, the Vernons claimed there had been no trouble at home, no family rows, no reason at all for Laura to walk out. But didn't parents always say that? So much could remain misunderstood among families, or never even suspected. Especially if they were a family who didn't have the time or the inclination to talk to each other much.

But there were other factors in this case. Laura had taken no clothes with her, very little money, no possessions of any kind. And initial enquiries had brought a sighting of her talking to a young man on Saturday night, at the edge of the expanse of hillside scrub and woodland known as the Baulk.

Once he got out on the hill below the village of Moorhay, Cooper had remembered that he had even been to Laura Vernon's home once. It was the big white house they called the Mount, which stood somewhere above the search party, hidden behind the trees on its own spur of land. It was a former mine owner's house, big and pretentious, with formally laid out grounds full of rhododendrons and azaleas, and with a stunning view over the valley from the terrace. Cooper had been invited to the Mount for the eighteenth birthday party of a classmate, a lad everyone at the old Edendale High School knew had well-off parents even before they were given the tour of the big house. That hadn't been the Vernons, but the people before them — they had been local people, the family of a man who had inherited a string of small petrol stations scattered throughout the Peak. The business had expanded from Edendale and its surrounding villages, beyond the borders of Derbyshire, in fact, into South Yorkshire and the fringes of the cities.

Eventually, of course, he had sold out to one of the larger companies, cashed in and moved away to somewhere better. Abroad, they said. The South of France and Italy were popular guesses.

The Mount had stood empty then for some time, waiting out the recession. Photographs of its elegant facade featured regularly in the adverts of upmarket estate agents in glossy county magazines. The village people would sit in the doctor's waiting room, pointing out to each other the multiplicity of bathrooms, wondering what a utility was and shaking their heads in astonishment at the number of noughts in the asking price. Then the Vernons had moved into the Mount.

No one knew where they had come from, or what Mr Vernon did, except that he was 'in business'. He drove off every day in his Jaguar XIS in the direction of Sheffield, sometimes staying away from home for days on end. Was he another one just pausing for a while in the Peak while he booked his ticket to Tuscany?

‘You'll be glad of the extra cash too, though, won't you? Just been on holiday?' said Garnett.

‘Scotland,' said Cooper.

‘Bloody hell. Scotland? It's just the Peak District, but with a bit more water, isn't it? Can't see the point of that, myself. Me, I want a bit of sun and sand when I go on leave. Not to mention the cheap booze, eh? I like Ibiza. There's loads of English pubs and casinos and stuff. A few bottles of sangria, a paella, and a go on the fruit machines. You can't beat it, that's what I say. Besides, the wife'd divorce me if I suggested anything else. She's on about the Maldives next year. I don't even know where it is.'

‘Somewhere east of Ibiza, I think,' said Cooper. 'But you'd like it.’

The line was moving forward again, and Cooper waved away a cloud of flies from his face. Sun and sand and cheap booze were far from his mind. Even during his fortnight on Skye, his thoughts had kept slipping away from the rock face, back to the promotion interviews that were coming up, now just a few days away. There would soon be a detective sergeant's job available at E Division. DS Osborne had been on sick leave for weeks now, and it was said that he would go the usual way — early retirement on health grounds, another pension to be paid for from the creaking police authority budget. Ben Cooper thought he was the natural successor to Osborne. Ten years in the force, and five in CID, and he had more local knowledge than most of the rest of his shift put together. The sergeant's job was what he wanted and needed. More — it was what his family wanted. Cooper thought of his mother, and the desperately hopeful look in her eye when he came home from work, the question as often unspoken as asked out loud. He thought about her many times a day, every time he saw someone ill or old. He thought of her seemingly endless pain and grief, and the one thing she thought might ease it. He ached to give her what she longed for, just this once.

The line of men were deep into the trees again now, the canopy over them muffling the noise of the police helicopter that was still moving along the valley, sweeping the woods with its thermal imaging camera. The sudden transition from glaring sun to deep shade made it difficult to make out the details of the undergrowth below the trees. In places there could have been an entire SAS platoon lying concealed in the chest-high bracken and willowherb, waiting for some bobby in blue overalls to stumble into them armed with nothing but a slug-encrusted pole.