Strike could see Robin’s appalled expression reflected in the round mirror standing beside the sink, where he was shaving. The police had taken away the leg at last, Strike had declared work suspended for the day and Robin remained at the little Formica table in his kitchen-cum-sitting room, cradling a second mug of tea.

“To tell you the truth,” he said, strafing stubble from his chin, “I think it’s only three. Think I might’ve made a mistake telling Wardle about Malley.”

“Why?”

Strike told Robin the story of his brief contact with the career criminal, who owed his last prison stretch, in part, to Strike’s evidence.

“… so now Wardle’s convinced the Harringay Crime Syndicate found out who I was, but I left for Iraq shortly after testifying and I’ve never yet known an SIB officer’s cover blown because he gave evidence in court. Plus, the song lyrics don’t smell like Digger. He’s not one for fancy touches.”

“But he’s cut bits off people he’s killed before?” Robin asked.

“Once that I know of—but don’t forget, whoever did this hasn’t necessarily killed anyone,” temporized Strike. “The leg could have come off an existing corpse. Could be hospital waste. Wardle’s going to check all that out. We won’t know much until forensics have had a look.”

The ghastly possibility that the leg had been taken from a still-living person, he chose not to mention.

In the ensuing pause, Strike rinsed his razor under the kitchen tap and Robin stared out of the window, lost in thought.

“Well, you had to tell Wardle about Malley,” said Robin, turning back to Strike, who met her gaze in his shaving mirror. “I mean, if he’s already sent someone a—what exactly did he send?” she asked, a little nervously.

“A penis,” said Strike. He washed his face clean and dried it on a towel before continuing. “Yeah, maybe you’re right. More I think about it, though, the surer I am it’s not him. Back in a minute—I want to change this shirt. I ripped two buttons off it when you screamed.”

“Sorry,” said Robin vaguely, as Strike disappeared into the bedroom.

Sipping her tea, she took a look around the room in which she was sitting. She had never been inside Strike’s attic flat before. The most she had done previously was knock on the door to deliver messages or, in some of their busiest and most sleep-deprived stretches, to wake him up. The kitchen-cum-sitting room was cramped but clean and orderly. There were virtually no signs of personality: mismatched mugs, a cheap tea towel folded beside the gas ring; no photographs and nothing decorative, save for a child’s drawing of a soldier, which had been tacked up on one of the wall units.

“Who drew that?” she asked, when Strike reappeared in a clean shirt.

“My nephew Jack. He likes me, for some reason.”

“Don’t fish.”

“I’m not fishing. I never know what to say to kids.”

“So you think you’ve met three men who would’ve—?” Robin began again.