Elin called Strike much later, after he had eaten a solitary evening meal in his flat. As usual, Saturday night was out of bounds for a meeting. He could hear her daughter playing in the background as she talked. They had already arranged to see each other for dinner on Sunday, but she had called to ask whether he fancied meeting her earlier. Her husband was determined to force the sale of the valuable flat in Clarence Terrace and she had started looking for a new property.

“Do you want to come and look at it with me?” she asked. “I’ve got an appointment at the show flat tomorrow at two.”

He knew, or thought he knew, that the invitation sprang, not from some eager hope that he would one day be living with her there—they had only been dating for three months—but because she was a woman who would always choose company when possible. Her air of cool self-sufficiency was misleading. They might never have met had she not preferred to attend a party full of her brother’s unknown colleagues and friends rather than spend a few hours alone. There was nothing wrong with that, of course, nothing wrong with being sociable, except that for a year now Strike had organized his life to suit himself and the habit was hard to break.

“Can’t,” he said, “sorry. I’m on a job until three.”

The lie convincingly told. She took it reasonably well. They agreed to meet at the bistro on Sunday evening as previously planned, which meant that he would be able to watch Arsenal–Liverpool in peace.

After he had hung up, he thought again of Robin, alone in the flat she shared with Matthew. Reaching for a cigarette, he turned on the TV and sank back onto his pillows in the dark.

Robin was having a strange weekend. Determined not to sink into moroseness just because she was alone and Strike had gone off to Elin’s (where had that thought come from? Of course he had gone; after all, it was the weekend, and it was no business of hers where he chose to spend it), she had spent hours on her laptop, doggedly pursuing one old line of inquiry, and one new.

Late on Saturday night she made an online discovery that caused her to jog three victory laps of the tiny sitting room and almost phone Strike to tell him. It took several minutes, with her heart thumping and her breath coming fast, to calm down, and to tell herself that the news would keep until Monday. It would be much more satisfying to tell him in person.

Knowing that Robin was alone, her mother called her twice over the weekend, both times pressing for a date when she could come down to London.

“I don’t know, Mum, not just now,” sighed Robin on Sunday morning. She was sitting in her pajamas on the sofa, laptop open in front of her again, trying to hold an online conversation with a member of the BIID community who called themselves <<Δēvōŧėė>>. She had only picked up her mother’s call because she was afraid ignoring it might result in an unannounced visit.