He shook his head.
"No," he said musingly, "I don't. I--I wish I did."
The boom of the gong sounded from the house, and we went in together. Poirot had been asked by John to remain to lunch, and was already seated at the table.
By tacit consent, all mention of the tragedy was barred. We conversed on the war, and other outside topics. But after the cheese and biscuits had been handed round, and Dorcas had left the room, Poirot suddenly leant forward to Mrs. Cavendish.
"Pardon me, madame, for recalling unpleasant memories, but I have a little idea"--Poirot's "little ideas" were becoming a perfect byword--"and would like to ask one or two questions."
"Of me? Certainly."
"You are too amiable, madame. What I want to ask is this: the door leading into Mrs. Inglethorp's room from that of Mademoiselle Cynthia, it was bolted, you say?"
"Certainly it was bolted," replied Mary Cavendish, rather surprised. "I said so at the inquest."
"Bolted?"
"Yes." She looked perplexed.
"I mean," explained Poirot, "you are sure it was bolted, and not merely locked?"
"Oh, I see what you mean. No, I don't know. I said bolted, meaning that it was fastened, and I could not open it, but I believe all the doors were found bolted on the inside."
"Still, as far as you are concerned, the door might equally well have been locked?"
"Oh, yes."
"You yourself did not happen to notice, madame, when you entered Mrs. Inglethorp's room, whether that door was bolted or not?"
"I--I believe it was."
"But you did not see it?"
"No. I--never looked."
"But I did," interrupted Lawrence suddenly. "I happened to notice that it was bolted."
"Ah, that settles it." And Poirot looked crestfallen.
I could not help rejoicing that, for once, one of his "little ideas" had come to naught.
After lunch Poirot begged me to accompany him home. I consented rather stiffly.
"You are annoyed, is it not so?" he asked anxiously, as we walked through the park.
"Not at all," I said coldly.
"That is well. That lifts a great load from my mind."
This was not quite what I had intended. I had hoped that he would have observed the stiffness of my manner. Still, the fervour of his words went towards the appeasing of my just displeasure. I thawed.