Punctually to the moment Poirot appeared. Katherine was waiting for him, and they drove off at once.
"Well, Mademoiselle, how goes it?"
She looked at his twinkling eyes, and was confirmed in her first impression that there was something very attractive about M. Hercule Poirot.
"This is our own Roman Policier, is it not?" said Poirot. "I made you the promise that we should study it together. And me, I always keep my promises."
"You are too kind," murmured Katherine.
"Ah, you mock yourself at me; but do you want to hear the developments of the case, or do you not?"
Katherine admitted that she did, and Poirot proceeded to sketch for her a thumbnail portrait of the Comte de la Roche.
"You think he killed her," said Katherine thoughtfully.
"That is the theory," said Poirot guardedly.
"Do you yourself believe that?"