“I don’t think so.”

“Not even⁠—that he was left-handed?”

“You’re a wizard, Moosior Poirot. How did you know that? He was left-handed. Not that it’s anything to do with the case.”

“Nothing whatever,” agreed Poirot hastily, seeing that Japp was slightly ruffled. “My little joke⁠—that was all. I like to play you the trick, see you.”

We went out upon an amicable understanding.

The following morning saw us wending our way to Dr. Savaronoff’s flat in Westminster.

“Sonia Daviloff,” I mused. “It’s a pretty name.”

Poirot stopped, and threw me a look of despair.