By driving to the station at once, we were just able to catch a train to London, though not the principal express. Poirot was sad and dissatisfied. For my part, I was tired and dozed in a corner. Suddenly, as we were just moving out of Taunton, Poirot uttered a piercing squeal.
“Vite, Hastings! Awake and jump. But jump, I say!”
Before I knew where I was, we were standing on the platform, bareheaded and minus our valises, while the train disappeared into the night. I was furious, but Poirot paid no attention.
“Imbecile that I have been!” he cried. “Triple imbecile! Not again will I vaunt my little gray cells!”
“That’s a good job, at any rate,” I said grumpily. “But what is this all about?”
As usual, when following out his own ideas, he paid absolutely no attention to me.
“The tradesmen’s books, I have left them entirely out of account! Yes, but where? Where? Never mind, I cannot be mistaken. We must return at once.”
Easier said than done. We managed to get a slow train to Exeter, and there Poirot hired a car. We arrived back at Crabtree Manor in the small hours of the morning. I pass over the bewilderment of the Bakers when we had at last aroused them. Paying no attention to anybody, Poirot strode at once to the study.
“I have been, not a triple imbecile, but thirty-six times one, my friend,” he deigned to remark. “Now, behold!”
Going straight to the desk, he drew out the key, and detached the envelope from it. I stared at him stupidly. How could he possibly hope to find a big will-form in that tiny envelope? With great care he cut open the envelope, laying it out flat. Then he lighted the fire and held the plain inside surface of the envelope to the flame. In a few minutes faint characters began to appear.