THE CASE FOR THE PROSECUTION
would be condemned. To my intense surprise, he replied that, on the contrary, he was extremely likely to be acquitted.
"But, Poirot—" I protested.
"Oh, my friend, have I not said to you all along that I have no proofs. It is one thing to know that a man is guilty, it is quite another matter to prove him so. And, in this case, there is terribly little evidence. That is the whole trouble. I, Hercule Poirot, know, but I lack the last link in my chain. And unless I can find that missing link—" He shook his head gravely.
"When did you first suspect John Cavendish?" I asked, after a minute or two.
"Did you not suspect him at all?"
"No, indeed."
"Not after that fragment of conversation you overheard between Mrs. Cavendish and her mother-in-law, and her subsequent lack of frankness at the inquest?"
"No."
"Did you not put two and two together, and reflect that if it was not Alfred Inglethorp who was quarrelling with his wife—and you remember, he strenuously denied it at the inquest—it must be either Lawrence or John. Now, if it was Lawrence, Mary Cavendish's conduct was just as inexplicable. But if, on the other hand, it
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