"Who else could they think did it?"
Wimsey realized, indeed, that everybody must be thinking it. He was exceedingly inclined to think it himself.
"Probably that's why she didn't turn up."
"Of course it is. She's not a fool. She must know."
"That's true. Look here, will you do something for me? Something more, I mean?"
"What?"
"From what you say, it looks as though Miss Dorland might find herself rather short of friends in the near future. If she comes to you...."
"I'm not going to spy on her. Not if she had poisoned fifty old generals."
"I don't want you to. But I want you to keep an open mind, and tell me what you think. Because I don't want to make a mistake over this. And I'm prejudiced. I want Miss Dorland to be guilty. So I'm very likely to persuade myself she is when she isn't. See?"
"Why do you want her to be guilty?"