One thing Owen had taught Mark was the importance of good communication; he had told him to stay in touch, always. But this early November day had been the wrong time for Mark to choose for his first solo patrol. Entirely the wrong day to be on his own.

‘This is Peakland Partridge Three. Owen? Owen? Where are you?’

And, of course, it had been the wrong day for Jenny Weston, too.

Jenny had been riding a yellow six-gear Dawes Kokomo. It had one-inch tyres, and a wire basket bolted over the rear wheel. It was hired from the Peak Cycle centre at Partridge Cross on a three-hour ticket, and Jenny had already ridden nearly five miles to reach the plateau of Ringham Moor.

The moor was littered with prehistoric burial mounds, cairns and stone circles, some so small or so ruined and overgrown that they were barely visible in the heather and bracken. It was not as well used as the moors to the south and west, Stanton and Harthill, but its tracks were more accessible to a mountain bike, its open spaces more solitary, its face that bit closer to the sky.

Ringham had become one of Jenny’s favourite places. There were many reasons that brought her back, needs and compulsions that had worn a track for her bike tyres right to the base of the Hammond Tower on Ringham Edge. She carried an impression in her mind of the view down into the valley from the tower – that steep plummet through the trees on to a litter of rocks at the bottom.

It had been a blustery day, with showers that blew across the hills in squalls, bludgeoning the birches and scattering dead leaves into the heather. There seemed to be little life on the moor. But at the bottom of the track, Jenny had passed a youth wearing a red woollen cap pulled low on his forehead, with large ears that stuck out like table-tennis bats. He had been walking very quickly towards the road, and had refused to raise his head to meet her eye as she passed. Jenny had pressed down harder on the pedals, seeking to gain distance from the youth, so that she over-exerted herself on the slope and had to stop further on, gasping from painful lungs as she looked back. The youth had gone, and there was no one else to be seen – only a fistful of jackdaws drifting against the face of one of the abandoned quarries, and a herd of cattle lying restlessly in a field on the slope below the Virgins.

Jenny had always believed she was safer on a bike. Two wheels and the extra speed gave her the confidence that she could get out of trouble, if she needed to. A woman on her own, in a place like Ringham Moor, ought to think about being careful.