“Build?” asked Wardle, who was scribbling in his notebook.

“Pretty big, I’d say, but he was probably padded out a bit by the jacket.”

Robin’s eyes wandered inadvertently to Strike as he reentered the room. “I mean, not—”

“Not a fat bastard like the boss?” Strike, who had overheard, suggested and Wardle, never slow to make or enjoy a dig at Strike, laughed under his breath.

“And he wore gloves,” said Robin, who had not smiled. “Black leather motorcycle gloves.”

“Of course he’d wear gloves,” said Wardle, adding a note. “I don’t suppose you noticed anything about the motorbike?”

“It was a Honda, red and black,” said Robin. “I noticed the logo, that winged symbol. I’d say 750cc. It was big.”

Wardle looked both startled and impressed.

“Robin’s a petrolhead,” said Strike. “Drives like Fernando Alonso.”

Robin wished that Strike would stop being cheery and flippant. A woman’s leg lay downstairs. Where was the rest of her? She must not cry. She wished she had had more sleep. That damn sofa… she had spent too many nights on the thing lately…

“And he made you sign for it?” asked Wardle.

“I wouldn’t say ‘made’ me,” said Robin. “He held out a clipboard and I did it automatically.”

“What was on the clipboard?”

“It looked like an invoice or…”

She closed her eyes in the effort to remember. Now she came to think of it, the form had looked amateurish, as though it had been put together on someone’s laptop, and she said as much.

“Were you expecting a package?” Wardle asked.

Robin explained about the disposable wedding cameras.

“What did he do once you’d taken it?”

“Got back on the bike and left. He drove off into Charing Cross Road.”

There was a knock on the door of the flat and Detective Sergeant Ekwensi reappeared holding the note that Strike had noticed lying beneath the leg, which was now enclosed in an evidence bag.

“Forensics are here,” she told Wardle. “This note was in the package. It would be good to know whether it means anything to Miss Ellacott.”

Wardle took the polythene-covered note and scanned it, frowning.

“It’s gibberish,” he said, then read aloud: “‘A harvest of limbs, of arms and of legs, of necks—’”

“‘—that turn like swans,’” interrupted Strike, who was leaning against the cooker and too far away to read the note, “‘as if inclined to gasp or pray.’”

The other three stared at him.

“They’re lyrics,” said Strike. Robin did not like the expression on his face. She could tell that the words meant something to him, something bad. With what looked like an effort, he elucidated: “From the last verse of ‘Mistress of the Salmon Salt.’ By Blue Öyster Cult.”

Detective Sergeant Ekwensi raised finely penciled eyebrows.

“Who?”

“Big seventies rock band.”

“You know their stuff well, I take it?” asked Wardle.

“I know that song,” said Strike.

“Do you think you know who sent this?”

Strike hesitated. As the other three watched him, a confused series of images and memories passed rapidly through the detective’s mind. A low voice said, She wanted to die. She was the quicklime girl. The thin leg of a twelve-year-old girl, scarred with silvery crisscrossing lines. A pair of small dark eyes like a ferret’s, narrowed in loathing. The tattoo of a yellow rose.