But Rose was glad that she’d been out the previous day. She’d been doubtful about it beforehand. No journey was without its risks, even if it was only three miles over the hill and down into the village of Matlock Bath. Despite a diversion to the shopping village, she’d arrived in the village too early, and had time to kill once she’d parked the Volvo.

Standing in her bedroom, Rose smiled at the recollection of her own weakness. Matlock Bath had been busy, as she ought to have known it would be. At first, she’d been disturbed by the number of people on North Parade, and nervous of the motorcyclists in their leathers, clustered by their bikes eating fish and chips out of paper wrappings. When she passed too close to them, the smell had been so overpowering that she thought she would faint. And that would never do.

She turned slowly on the rug, fighting the muzziness and disorientation of being awake when her body wanted to sleep. There were only two points of light in her bedroom – the face of her alarm clock, showing two thirty-three, and the echo of its green luminescence in the mirror on the opposite wall. She found it difficult to focus on the light, because she couldn’t judge its distance from the reflection.

She could smell those fish and chips, even now. The odour was so powerful that for a moment she had no idea where she was. Time and place began to blur, a street in a Derbyshire tourist village merging into an image of a deserted roadside with the smell of gunfire in the air, then whirling back to her bedroom, with those two green points of light rushing towards her out of the darkness. Feeling giddy, Rose steadied herself with a hand on the wall and sat down in a chair by the window.

No, no, she was wrong. It was a bad mistake she’d made yesterday. The sort of mistake she’d taught herself to avoid, that she had made such careful plans against. But she hadn’t been able to avoid it. There was no other way out.

Rose breathed deeply, trying to control the dizziness. For a moment, it had been just as if those motorcyclists had entered her bedroom. She could hear the creak of their black leathers, the thud of their heavy boots against the doorframe. There was the rustle of their paper wrappings, the acrid tang of the vinegar. Somewhere, perhaps, the rumble of an engine, coming closer.

The bikers had been irrelevant, though. Waiting in Matlock Bath, Rose’s first impressions had been the steepness of the hills above her, the denseness of the trees, the roofs of houses perched among them in apparently impossible places. Soon a sense of her vulnerability had become too strong, and she had to get off the street, to find somewhere she could feel safer.