“A mauvais sujet ,” said Poirot, shaking his head; “but les femmes ⁠—they like that, eh?”

He twinkled at Katherine and she laughed.

“He is the kind of man one would notice anywhere,” continued Poirot. “Doubtless you observed him on the Blue Train?”

“Yes, I noticed him.”

“In the restaurant car?”

“No. I didn’t notice him at meals at all. I only saw him once⁠—going into his wife’s compartment.”

Poirot nodded. “A strange business,” he murmured. “I believe you said you were awake, Mademoiselle, and looked out of your window at Lyons? You saw no tall dark man such as the Comte de la Roche leave the train?”