In the end, Wednesday morning looked set to be overcast. Diane Fry had come through the Forestry Commission plantations and down past Flash Dam. She was already slightly late, but she sat in her car at the top of Sydnope Hill for a while and looked down on Matlock. She was watching the clouds come closer. They were rolling in from the east, their shadows chasing across the slopes of the hills and into the town.

Fry had worked out where the roof of Derwent Court was, deep among the other roofs. At the moment, its tiles were glittering as the clear November sun fell on the remains of an overnight frost. She was due at Maggie’s at nine. But by the time the clouds had closed in enough for her satisfaction, it was nearly five past. Fry started the car. Maggie would be annoyed that she was late, but that was tough. She didn’t want any distractions today. It was difficult enough as it was.

From here, she could see how damaged the landscape was to the east. Huge sections had been gouged and blasted from the side of Masson Hill, on the opposite side of the town. Bare terraces of exposed rock had been left by the quarrying, flat and unnatural in the slope of the hill. She checked the sky again for clouds. It was safe. There would be no sun on Maggie’s window now.

‘So you did come back,’ said Maggie a few minutes later. ‘I imagined I might have escaped your attentions. I thought you might have forgotten me.’

‘Never, Maggie.’

‘Oh? You remember me for my sparkling personality, do you? My intellect? My savage wit?’

Fry noticed that Maggie had rearranged the lamps in the room. The lighting was softer, less uncompromising, perhaps designed to put her visitor at ease and make her more welcome. A new chair had been placed in front of the desk – this one was upholstered in green satin on the seat and back, and when Fry sat in it she found it remarkably comfortable.

The cafetiere stood ready on the desk with cream and sugar in a ceramic jug and bowl. By such signs, Fry knew she was making progress. But it was a fragile intimacy; it could be broken in a second, by the ringing of a phone or the scrape of a chair leg.

‘I thought we were getting along fine before,’ she said.

‘Did you?’ Maggie fiddled with the lamp, tilting the shade so that the shadows played backwards and forwards across her face. Fry found the effect disconcerting, as Maggie’s good eye came first into the light, startling and white, then vanished again into the shadows of her face.