‘It’s early days, yet,’ said the DCI. ‘But we’re hopeful of an identification on the footwear. There’s sufficient impression from the sole to get a match, we think.’

‘But was it made at the time, sir?’

‘Ah.’ Tailby pointed to a small, dark smudge on the photograph. ‘This is a trace of the victim’s blood. The significant thing about it is that the print was made on top of the blood stain while it was still fresh.’

He nodded with some degree of satisfaction. Early forensic evidence was exactly what everyone prayed for. A boot print that would connect its wearer to the scene at the time of the offence – what better could they ask for at such an early stage? Well, a suspect with footwear to compare the boot print to, that’s what.

‘Read the preliminary crime scene report,’ said Tailby.

There was another shuffling of papers. Cooper looked down at his file. There was a computer-printed list of items retrieved from the area around the Virgins, but it was a long one, difficult to take in. The SOCOs had taken samples of vegetation, including heather, whinberry, gorse and three types of grass. They had taken sections of bark from the trunks of the birches where they had been cut by a knife or splashed with an unknown substance. They had brought in stones, half-bricks, bags of ash and cinders, sheets of corrugated iron, a small metal grille like a fire grate, a burnt corner of the Sheffield Star where half a dozen screwed-up pages had been used to help light a fire, a British Midland Airways refresher tissue wrapper, a whole pile of aluminium ring-pulls, several cigarette butts, a Findus crispy pancake packet, and a selection of used condoms.

The forensic team had covered a wide area – all of the clearing around the stones, right into the birches and as far as the fence around the edge of the quarry. The SOCOs must have balked at the view to the east, towards the edge of the plateau. Cooper could remember a sea of bracken – damp, endless acres of it, stretching to the Hammond Tower and beyond, flowing over the edge of the cliff, dense and almost impenetrable. Beyond the bracken was a low wire fence with wooden posts, then beyond it a precipitous drop. From there, an object would plummet a thousand feet into the trees that grew at acute angles on the lower edges of the slope into the dale.

Scrapings had been taken from a pool of white wax that had solidified in the hollow of a rotten tree, while digging in what at first appeared to be a rubbish hole turned up the bones of an animal. There were latent prints collected from the handlebars, saddle, front wheel and crossbar of the Dawes Kokomo Jenny Weston had been riding, and more samples of blood had been scraped from the frame of the bike.