Page:The Mystery of the Blue Train.pdf/293

 human oyster. No, I will lay my cards on the table, which is assuredly a thing that oysters do not do. You suspect, do you not, that I am not satisfied with the case against Derek Kettering?"

"That is what I have been wondering. I thought, in Nice, that you had finished with the case."

"You do not say all that you mean, Mademoiselle. But I admit everything. It was Imy researcheswhich placed Derek Kettering where he is now. But for me the Examining Magistrate would still be vainly trying to fasten the crime on the Comte de la Roche. Eh bien, Mademoiselle, what I have done I do not regret. I have only one dutyto discover the truth, and that way led straight to Mr. Kettering. But did it end there? The police say yes, but I, Hercule Poirot, am not satisfied."

He broke off suddenly. "Tell me. Mademoiselle, have you heard from Mademoiselle Lenox lately?"

"One very short, scrappy letter. She is, I think, annoyed with me for coming back to England."

Poirot nodded.

"I had an interview with her the night that Monsieur Kettering was arrested. It was an interesting interview in more ways than one."

Again he fell silent, and Katherine did not interrupt his train of thought.

"Mademoiselle," he said at last, "I am now on delicate ground, yet I will say this to you. There is, I think, some one who loves Monsieur Ketteringcorrect me if I am wrongand for her sakewellfor her sake I hope that I am right and the police are wrong. You know who that some one is?"