"Allons!" he said. "We must act at once. Where is Mr. Cavendish?"

John was in the smoking-room. Poirot went straight to him.

"Mr. Cavendish, I have some important business in Tadminster. A new clue. May I take your motor?"

"Why, of course. Do you mean at once?"

"If you please."

John rang the bell, and ordered round the car. In another ten minutes, we were racing down the park and along the high road to Tadminster.

"Now, Poirot," I remarked resignedly, "perhaps you will tell me what all this is about?"

"Well, mon ami, a good deal you can guess for yourself. Of course you realize that, now Mr. Inglethorp is out of it, the whole position is greatly changed. We are face to face with an entirely new problem. We know now that there is one person who did not buy the poison. We have cleared away the manufactured clues. Now for the real ones. I have ascertained that anyone in the household, with the exception of Mrs. Cavendish, who was playing tennis with you, could have personated Mr. Inglethorp on Monday evening. In the same way, we have his statement that he put the coffee down in the hall. No one took much notice of that at the inquest--but now it has a very different significance. We must find out who did take that coffee to Mrs. Inglethorp eventually, or who passed through the hall whilst it was standing there. From your account, there are only two people whom we can positively say did not go near the coffee--Mrs. Cavendish, and Mademoiselle Cynthia."

"Yes, that is so." I felt an inexpressible lightening of the heart. Mary Cavendish could certainly not rest under suspicion.

"In clearing Alfred Inglethorp," continued Poirot, "I have been obliged to show my hand sooner than I intended. As long as I might be thought to be pursuing him, the criminal would be off his guard. Now, he will be doubly careful. Yes--doubly careful." He turned to me abruptly. "Tell me, Hastings, you yourself--have you no suspicions of anybody?"

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I hesitated. To tell the truth, an idea, wild and extravagant in itself, had once or twice that morning flashed through my brain. I had rejected it as absurd, nevertheless it persisted.

"You couldn't call it a suspicion," I murmured. "It's so utterly foolish."

"Come now," urged Poirot encouragingly. "Do not fear. Speak your mind. You should always pay attention to your instincts."




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