“Why did you not say all this when you were arrested?”

“In my delicate position I was forced to deny any association with the man.”

“And how do you account for the events of the evening, then?”

“I can only think that someone must have deliberately impersonated me. I understand that no money was found in the flat.”

Poirot looked at him and shook his head.

“Strange,” he murmured. “We all have the little grey cells. And so few of us know how to use them. Good morning, Signor Ascanio. I believe your story. It is very much as I had imagined. But I had to make sure.”

After bowing his guest out, Poirot returned to his armchair and smiled at me.