"Ah!—before I forget it." He whipped something from a pocket and held it out.
"Permit me to offer you a cigarette—out of your own cigarette case. It was careless of you to drop it when you boarded the train on the ceinture at Paris."
Knighton stood staring at him as though stupefied. Then he made a movement, but Poirot flung up his hand in a warning gesture.
"No, don't move," he said in a silky voice; "the door into the next compartment is open, and you are being covered from there this minute. I unbolted the door into the corridor when we left Paris, and our friends the police were told to take their places there. As I expect you know, the French police want you rather urgently, Major Knighton—or shall we say—Monsieur le Marquis?"
35. Explanations
"Explanations?"
Poirot smiled. He was sitting opposite the millionaire at a luncheon table in the latter's private suite at the Negresco. Facing him was a relieved but very puzzled man. Poirot leant back in his chair, lit one of his tiny cigarettes, and stared reflectively at the ceiling.
"Yes, I will give you explanations. It began with the one point that puzzled me. You know what that point was? The disfigured face. It is not an uncommon thing to find when investigating a crime and it rouses an immediate question, the question of identity. That naturally was the first thing that occurred to me. Was the dead woman really Mrs. Kettering? But that line led me nowhere, for Miss Grey's evidence was positive and very reliable, so I put that idea aside. The dead woman was Ruth Kettering."
"When did you first begin to suspect the maid?"