‘Yes, we had a man round here asking questions,’ she said. ‘He was a property enquiry agent.’

‘What’s one of those?’ asked Fry.

‘He said he was making enquiries on behalf of a prospective house purchaser. He wanted to know what the neighbourhood was like, whether it was quiet, how many children there were living in the area. That sort of thing.’

‘Did he ask questions about your neighbours?’

She looked a bit embarrassed. ‘Well, I’m not sure he asked questions about them exactly, but I suppose I might have ended up telling him a few things. There’s always a bit of gossip in a village like this.’

‘About the Redfearns, for example.’

‘I didn’t give away any secrets,’ she protested. ‘I only told him things that everyone around here knows.’

‘Of course. Did you happen to get a name for this man?’

‘I’m not daft. I asked him for his identity.’ She put a hand to her mouth. ‘Oh, he left me a business card. I forgot to tell the other police officer that.’

‘Can I see it, please?’

‘Give me a minute and I’ll find it for you. It’s around here somewhere.’

‘Thank you.’

But she didn’t go straight away to look for the card.

‘Did I do something wrong?’ she asked.

‘Not so far,’ said Fry. ‘But you might be more careful about who you talk to in future.’

When she’d seen the card, Fry called Ben Cooper. She guessed he would still be at Pilsbury trying to sniff out a lead of his own.

‘There’s a job I’d like you to do,’ she said. ‘I think you’d be the best person for it.’

It was one of the most remote farmsteads in the area. Even the narrow back road over the eastern slope of the moor seemed like the back of beyond. Cooper had reached a point on the road where he could see nothing in any direction except vast expanses of exposed moorland and lots more hills in the distance to the north.

And this was the spot where he had to turn off. He found a cattle grid and a muddy entrance to a track, which wandered away over the brow of the moor, apparently leading nowhere. He wouldn’t have known it was the right place, except for a small sign on the fence. Bagshaw Farm.

‘What was this man’s name?’ Cooper had asked Fry.

‘Daniel Grady. Do you know him?’

‘Why on earth should I?’

‘Well, you always seem to know everyone.’

‘Not this one.’

Cooper followed the potholed track between swathes of rough grazing land, where clumps of coarse grass battled with heather and whinberry for survival in a harsh environment. One patch of ground seemed to have been levelled and seeded for some purpose – possibly for use by hang-gliders, given the air currents funnelling in from Axe Edge.

As he crested the rise the track took a wide swing to the left and a view opened out into the valley and across to the Staffordshire hills. Suddenly, right in front of him, he saw the Dragon’s Back, appearing much closer than he’d expected. But still he seemed to be heading nowhere. A scatter of stones on a prominent mound could have been the remains of a wall, an old farm building, or something much more ancient and mysterious.

And there, below him on the western slope, was Bagshaw Farm itself. Two houses surrounded by a sprawling cluster of barns, sheds and outbuildings. The track took another couple of swings before it skirted along a wall past more fertile looking in-bye land and reached the farm entrance.

As Cooper turned in he was surprised by the number of vehicles parked in the yard and in front of one of the biggest sheds. They were mostly pick-up trucks and Land Rovers, but there were a few muddy saloon cars too, parked up between trailers and farm equipment.

He’d seen this sort of thing before – an unnatural amount of activity at an isolated farm like this was sometimes a warning sign. Who knew what kind of activities went on here, where no one would see them? It could be something perfectly innocent, of course. But it would be worthwhile keeping his eyes and ears open while he was at Bagshaw Farm.

He found Daniel Grady in an office in the newer of the two houses. He pretty much matched the description that Fry had obtained from the Redfearns’ neighbour in Taddington. There was nothing outstanding about him. He was average height, with medium brown hair cut short, but not too short. Aged in his mid-thirties, perhaps forty or so – it was difficult to tell. Dressed in an unremarkable suit, he was clean shaven, with a hint of a stoop and a very courteous manner. He could have been purpose-designed for the job of asking questions without attracting suspicion.

Cooper glanced around the office. It was lined with shelves full of colour-coded box files. Two filing cabinets stood behind the door, and Grady had squeezed in a desk with a laptop and printer. More equipment was in the corner. Cooper spotted a desktop scanner and a digital camera with a long lens.

‘You’re a property enquiry agent, sir?’ he said. ‘I’ve never heard of that profession.’

‘It’s a new idea,’ said Grady with a smug smile. ‘An entrepreneurial opportunity. We all know that one of the most important factors in living a peaceful and contented life in a new home is what sort of neighbours you have. Yet there’s no established way of finding anything out about your neighbours before you actually commit yourself to buying a house. That’s where I come in.’

He produced one of his cards and handed it to Cooper. It was headed by a logo showing a rose-covered cottage and the slogan ‘Who will you be living next door to?’

‘When you’re considering a new property, the estate agent won’t tell you anything about the neighbours in the sales details,’ said Grady. ‘They’ll list the local schools, the transport links, the nearest golf course. But they don’t mention what the people next door are like. Among all those checks and searches your solicitors do into planning permissions and rights of way and mining subsidence, there’s no background check on the local residents.’

‘But there’s a questionnaire,’ said Cooper.

Grady switched on a smile. ‘Oh, are you thinking of buying a house?’

‘Not at the moment. Well, not any more.’

For a moment Grady’s smile almost slipped. ‘Ah. Well, yes, you do have a questionnaire filled in by the vendor. “Have you had any disputes with neighbours during the past five years?” But what seller in their right mind would answer “yes” to that and jeopardise their own sale? By the time you’ve completed the purchase, exchanged contracts and moved in, it’s much too late. When you find out the horrible truth, you’re stuck with those neighbours that you knew nothing about.’

‘I see.’

Grady nodded eagerly as he got into the swing of his sales pitch. ‘We’re filling that gap in the market, providing an essential service for prospective house buyers. Come to us and we’ll tell you what your future neighbours are like. We’re totally independent and objective, too.’

Cooper waited until he’d wound down.

‘You’re just a snooper, aren’t you?’ he said.

Now Grady looked disappointed. ‘That’s rather harsh, Detective Sergeant Cooper. Background checks are perfectly common these days in other fields. You can’t get a job in teaching or childcare, or work as a volunteer for some charities, without having to go through a Criminal Records Bureau check.’

‘That’s true.’

‘The Church of England won’t let you do the flower arrangements in your local church without a pass from the CRB. Nobody objects to that. So why shouldn’t we gather some basic information about the people we’re going to be living next door to?’

‘But what sort of information are you collecting? You’re just an ordinary member of the public. You don’t have access to criminal records.’

‘Absolutely. That would be illegal.’

‘So?’

‘I’m sure you don’t expect me to reveal my methods, Detective Sergeant.’

‘Of course, if we should find during our enquiries that anything you’re doing is unlawful…’