genius, and a certain initial facial resemblance. But in the case of Alfred Inglethorp, all that is changed. His clothes, his beard, the glasses which hide his eyes—those are the salient points about his personal appearance. Now, what is the first instinct of the criminal? To divert suspicion from himself, is it not so? And how can he best do that? By throwing it on some one else. In this instance, there was a man ready to his hand. Everybody was predisposed to believe in Mr. Inglethorp’s guilt. It was a foregone conclusion that he would be suspected; but, to make it a sure thing there must be tangible proof—such as the actual buying of the poison, and that, with a man of the peculiar appearance of Mr. Inglethorp, was not difficult. Remember, this young Mace had never actually spoken to Mr. Inglethorp. How should he doubt that the man in his clothes, with his beard and his glasses, was not Alfred Inglethorp?”
“It may be so,” I said, fascinated by Poirot’s eloquence. “But, if that was the case, why does he not say where he was at six o’clock on Monday evening?”
“Ah, why indeed?” said Poirot, calming down. “If he were arrested, he probably would speak, but I do not want it to come to that. I must make him see the gravity of his position. There is, of course, something discreditable behind his silence. If he did not murder his wife, he is, nevertheless, a scoundrel, and has something of his own to conceal, quite apart from the murder.”
“What can it be?” I mused, won over to Poirot’s views for the moment, although still retaining a faint conviction that the obvious deduction was the correct one.
“Can you not guess?” asked Poirot, smiling.
“No, can you?”
“Oh, yes, I had a little idea sometime ago—and it has turned out to be correct.”
“You never told me,” I said reproachfully.
Poirot spread out his hands apologetically.
“Pardon me, mon ami, you were not precisely sympathique.” He turned to me earnestly. “Tell me—you see now that he must not be arrested?”
“Perhaps,” I said doubtfully, for I was really quite indifferent to the fate of Alfred Inglethorp, and thought that a good fright would do him no harm.
Poirot, who was watching me intently, gave a sigh.
“Come, my friend,” he said, changing the subject, “apart from Mr. Inglethorp, how did the evidence at the inquest strike you?”
“Oh, pretty much what I expected.”
“Did nothing strike you as peculiar about it?”
My thoughts flew to Mary Cavendish, and I hedged:
“In what way?”
“Well, Mr. Lawrence Cavendish’s evidence for instance?”
I was relieved.
“Oh, Lawrence! No, I don’t think so. He’s always a nervous chap.”
“His suggestion that his mother might have been poisoned accidentally by means of the tonic she was taking, that did not strike you as strange—hein?”
“No, I can’t say it did. The doctors ridiculed it of course. But it was quite a natural suggestion for a layman to make.”
“But Monsieur Lawrence is not a layman. You told me yourself that he had started by studying medicine, and that he had taken his degree.”
“Yes, that’s true. I never thought of that.” I was rather startled. “It is odd.”
Poirot nodded.
“From the first, his behaviour has been peculiar. Of all the household, he alone would be likely to recognize the symptoms of strychnine poisoning, and yet we find him the only member of the family to uphold strenuously the theory of death from natural causes. If it had been Monsieur John, I could have understood it. He has no technical knowledge, and is by nature unimaginative. But Monsieur Lawrence—no! And now, to-day, he puts forward a suggestion that he himself must have known was ridiculous. There is food for thought in this, mon ami!”
“It’s very confusing,” I agreed.
“Then there is Mrs. Cavendish,” continued Poirot. “That’s another who is not telling all she knows! What do you make of her attitude?”
“I don’t know what to make of it. It seems inconceivable that she should be shielding Alfred Inglethorp. Yet that is what it looks like.”
Poirot nodded reflectively.
“Yes, it is queer. One thing is certain, she overheard a good deal more of that ‘private conversation’ than she was willing to admit.”
“And yet she is the last person one would accuse of stooping to eavesdrop!”
“Exactly. One thing her evidence has shown me. I made a mistake. Dorcas was quite right. The quarrel did take place earlier in the afternoon, about four o’clock, as she said.”
I looked at him curiously. I had never understood his insistence on that point.
“Yes, a good deal that was peculiar came out to-day,” continued Poirot. “Dr. Bauerstein, now, what was he doing up and dressed at that hour in the morning? It is astonishing to me that no one commented on the fact.”
“He has insomnia, I believe,” I said doubtfully.
“Which is a very good, or a very bad explanation,” remarked Poirot. “It covers everything, and explains nothing. I shall keep my eye on our clever Dr. Bauerstein.”
“Any more faults to find with the evidence?” I inquired satirically.
“Mon ami,” replied Poirot gravely, “when you find that people are not telling you the truth—look out! Now, unless I am much mistaken, at the inquest to-day only one—at most, two persons were speaking the truth without reservation or subterfuge.”
“Oh, come now, Poirot! I won’t cite Lawrence, or Mrs. Cavendish. But there’s John—and Miss Howard, surely they were speaking the truth?”
“Both of them, my friend? One, I grant you, but both——!”
His words gave me an unpleasant shock. Miss Howard’s evidence, unimportant as it was, had been given in such a downright straightforward manner that it had never occurred to me to doubt her sincerity. Still, I had a great respect for Poirot’s sagacity—except on the occasions when he was what I described to myself as “foolishly pig-headed.”
“Do you really think so?” I asked. “Miss Howard had always seemed to me so essentially honest—almost uncomfortably so.”
Poirot gave me a curious look, which I could not quite fathom. He seemed to speak, and then checked himself.
“Miss Murdoch too,” I continued, “there’s nothing untruthful about her.”
“No. But it was strange that she never heard a sound, sleeping next door; whereas Mrs. Cavendish, in the other wing of the building, distinctly heard the table fall.”
“Well,
