“I don’t mean to. I just can’t bear to think of Alison getting hurt.”

“She won’t, I promise. And that—just now”—he gestured around the car as if the kiss was still floating in the air—“That was wrong of me. Greg’s death has left me feeling at a loss. Forgive me.”

AFTER HE HAD driven away I entered my house, but only to dump the shopping bag of Greg’s effects I’d brought back from his parents. Then I walked to the Underground station, eyes watering in the easterly wind. In spite of everything I made up my mind to go back to Party Animals, and I couldn’t bear to wait, even though I wasn’t sure what I would do there, except more snooping.

The first train was thirteen minutes away, and I wanted to weep with impatience. I paced up and down the platform. I had three new pieces to add to Life’s Most Difficult Jigsaw Puzzle: Milena had been having an affair with Frances’s husband; Johnny had been with Milena on the one night when I had evidence to show that she was with Greg; the menu card with Milena’s note written to Greg and finally discovered by Fergus tucked inside a book was therefore . . .

I stopped, my brain hurting with the effort of holding together all the information that wanted to fly in different directions. Therefore what? Therefore a typo, a tease, a slip of the pen, a red herring, a mistake, a contradiction, a fraud, a mystery—something manufactured to drive me mad.

I rang the bell, and when Frances didn’t answer the door, let myself in with the key I still had. I called from the top of the stairs. The basement light was on. I knew Beth was away on holiday, so I thought that Frances was probably about, but there was no answer. I went down, wriggling out of my coat as I did so, pulling off my scarf, tossing them both over the easy chair as I came into the room.

Frances had obviously been there earlier and was expecting to return. The radiator was warm, the Anglepoise lamp over her desk was turned on, although the rest of the room was in shadow, and there was a mug beside her computer, as well as her glasses and several glossy holiday brochures with exotic destinations.