“Well,” said Frid impatiently, “what shall we say? Quick. Before he comes back.”

“You will tell Alleyn the truth, Frid,” said Lord Charles.

“But, Daddy—”

“You will tell him the truth.” He looked at Lady Katherine. “After all,” he added, “nothing matters much now, after what has been already told.”

“But — all right, Daddy,” said Frid. “The truth it is. I don’t know what everybody else thinks, but to me it’s pretty obvious who did it.”

The others stared at her. Frid gestured towards the door.

“Oh, no,” said her father.

“Daddy, but of course. She’s mad. She’s stark ravers. You know how they hated each other. And Mummy, you said that you left her alone when you came here to ask one of the boys to work the lift. She must have done it then. Who else?”

“Charlie, do you think…”

Lord Charles stared at his wife. “Who else, Immy?” he said. “Who else?”