“I mayn’t have actually mentioned Liverpool, but I knew he’d try to get away to America. That’s what Crippen did.”

“Without much success,” I reminded her.

“Poor boy, and so they’ve caught him. I consider, James, that it’s your duty to see that he isn’t hung.”

“What do you expect me to do?”

“Why, you’re a medical man, aren’t you? You’ve known him from a boy upwards. Not mentally responsible. That’s the line to take, clearly. I read only the other day that they’re very happy in Broadmoor⁠—it’s quite like a high-class club.”

But Caroline’s words had reminded me of something.

“I never knew that Poirot had an imbecile nephew?” I said curiously.