Robin tried to smile back.

“She was stabbed?” interposed Strike.

“They’re working on what actually killed her,” said Wardle, “but there are two deep wounds to the torso they’re pretty sure would have done it before he started cutting her up.”

Beneath the table top, Robin made fists, her nails digging deep into her palms.

“Now,” said Wardle, and Detective Sergeant Ekwensi clicked out the nib of her pen and prepared to write, “does the name Oxana Voloshina mean anything to either of you?”

“No,” said Strike and Robin shook her head.

“It looks like that was the victim’s real name,” Wardle explained. “That’s how she signed her tenancy agreement and the landlady says she provided ID. She was claiming to be a student.”

“Claiming?” said Robin.

“We’re looking into who she really was,” said Wardle.

Of course, thought Robin, he’s expecting her to be a prostitute.

“Her English was good, judging by her letter,” commented Strike. “That’s if she genuinely wrote it.”

Robin looked at him, confused.

“If someone’s faking letters from me, why couldn’t they have faked the letter from her?” Strike asked her.

“To try and get you to genuinely communicate with her, you mean?”

“Yeah—lure me to a rendezvous or lay some kind of paper trail between us that would look incriminating once she was dead.”

“Van, go see if the photos of the body are viewable,” said Wardle.

Detective Sergeant Ekwensi left the room. Her posture was that of a model. Robin’s insides began to crawl with panic. As though Wardle had sensed it, he turned to her and said:

“I don’t think you’ll need to look at them if Strike—”

“She should look,” said Strike.

Wardle looked taken aback and Robin, though she tried not to show it, found herself wondering whether Strike was trying to scare her into compliance with his nothing-after-dark rule.

“Yes,” she said, with a decent show of calm. “I think I should.”

“They’re—not nice,” said Wardle, with uncharacteristic understatement.

“The leg was sent to Robin,” Strike reminded him. “There’s as much chance that she’s seen this woman previously as I have. She’s my partner. We work the same jobs.”

Robin glanced sideways at Strike. He had never before described her as his partner to somebody else, or not within Robin’s hearing. He was not looking at her. Robin switched her attention back to Wardle. Apprehensive though she was, after hearing Strike put her on equal professional footing with himself she knew that, whatever she was about to see, she would not let herself, or him, down. When Detective Sergeant Ekwensi returned holding a sheaf of photographs in her hand Robin swallowed hard and straightened her back.

Strike took them first and his reaction was not reassuring.

“Holy fucking shit.”

“The head’s best preserved,” said Wardle quietly, “because he put it in the freezer.”

Just as she would have withdrawn her hand instinctively from something red hot, Robin now had to fight a powerful urge to turn away, to close her eyes, to flip the photograph over. Instead she took it from Strike and looked down; her intestines became liquid.