"I'll do my best. I'll even try to tell you why the murderer came back this afternoon to disturb his victim."
Bobby went, curiously convinced that the doctor had had the better of the argument.
For a moment Katherine, Graham, Paredes, and he were alone in the main hall.
"God knows what it was," Graham said, "but it may mean something to you, Bobby. Tell us carefully, Katherine, about the sounds that came to you across the court."
"It was just what I heard last night when he died," she answered. "It was like something falling softly, then a long-drawn sigh. I tried to pay no attention. I fought it. I didn't call at first. But I couldn't keep quiet. I knew we had to go to that room. It never occurred to me that the detective or the coroner might be there moving around."
"You were alone up here?" Graham said.
"I think so."
"No," Bobby said. "I was in my room."
"What were you doing?" Graham asked.
"I was asleep. Katherine's call woke me up."