“‘Not Cormoran’s,’” he had repeated in that moronic squeal. As Robin rounded the corner into Denmark Street she felt as furious as she had eight hours ago, when she had stormed out of the bedroom to sleep on the sofa.

Sarah Shadlock, bloody Sarah Shadlock, who had been at university with Matthew and had tried as hard as she could to win him away from Robin, the girl left behind in Yorkshire… If Robin could have been sure she would never see Sarah again she would have rejoiced, but Sarah would be at their wedding in July, Sarah would doubtless continue to plague their married life, and perhaps one day she would try to worm her way into Robin’s office to meet Strike, if her interest was genuine and not merely a means of sowing discord between Robin and Matthew.

I will never introduce her to Cormoran, thought Robin savagely as she approached the courier standing outside the door to the office. He had a clipboard in one gloved hand and a long rectangular package in the other.

“Is that for Ellacott?” Robin asked as she came within speaking distance. She was expecting an order of ivory cardboard-covered disposable cameras, which were to be favors at the wedding reception. Her working hours had become so irregular of late that she found it easier to send online orders to the office rather than the flat.

The courier nodded and held out the clipboard without taking off his motorcycle helmet. Robin signed and took the long package, which was much heavier than she had expected; it felt as though some single large object slid inside it as she put it under her arm.

“Thank you,” she said, but the courier had already turned away and swung a leg over his motorbike. She heard him ride away as she let herself inside the building.

Up the echoing metal staircase that wound around the broken birdcage lift she walked, her heels clanging on the metal. The glass door flashed as she unlocked and opened it and the engraved legend—C. B. STRIKE, PRIVATE INVESTIGATOR—stood out darkly.

She had arrived deliberately early. They were currently inundated with cases and she wanted to catch up with some paperwork before resuming her daily surveillance of a young Russian lap-dancer. From the sound of heavy footfalls overhead, she deduced that Strike was still upstairs in his flat.

Robin laid her oblong package on the desk, took off her coat and hung it, with her bag, on a peg behind the door, turned on the light, filled and switched on the kettle, then reached for the sharp letter-opener on her desk. Remembering Matthew’s flat refusal to believe that it had been flanker Jacques Burger’s curly mane she had been admiring, rather than Strike’s short and frankly pube-like hair, she made an angry stab to the end of the package, slit it open and pulled the box apart.

A woman’s severed leg had been crammed sideways in the box, the toes of the foot bent back to fit.