"But now a fresh dilemma arises: he dare not keep that piece of paper on him. He may be seen leaving the room--he may be searched. If the paper is found on him, it is certain doom. Probably, at this minute, too, he hears the sounds below of Mr. Wells and John leaving the boudoir. He must act quickly. Where can he hide this terrible slip of paper? The contents of the waste-paper-basket are kept and in any case, are sure to be examined. There are no means of destroying it; and he dare not keep it. He looks round, and he sees--what do you think, mon ami?"

I shook my head.

"In a moment, he has torn the letter into long thin strips, and rolling them up into spills he thrusts them hurriedly in amongst the other spills in the vase on the mantle-piece."

I uttered an exclamation.

"No one would think of looking there," Poirot continued. "And he will be able, at his leisure, to come back and destroy this solitary piece of evidence against him."

"Then, all the time, it was in the spill vase in Mrs. Inglethorp's bedroom, under our very noses?" I cried.

Poirot nodded.

"Yes, my friend. That is where I discovered my 'last link,' and I owe that very fortunate discovery to you."

"To me?"

"Yes. Do you remember telling me that my hand shook as I was straightening the ornaments on the mantel-piece?"

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"Yes, but I don't see----"

"No, but I saw. Do you know, my friend, I remembered that earlier in the morning, when we had been there together, I had straightened all the objects on the mantel-piece. And, if they were already straightened, there would be no need to straighten them again, unless, in the meantime, some one else had touched them."

"Dear me," I murmured, "so that is the explanation of your extraordinary behaviour. You rushed down to Styles, and found it still there?"

"Yes, and it was a race for time."

"But I still can't understand why Inglethorp was such a fool as to leave it there when he had plenty of opportunity to destroy it."

"Ah, but he had no opportunity. I saw to that."

"You?"

"Yes. Do you remember reproving me for taking the household into my confidence on the subject?"

"Yes."

"Well, my friend, I saw there was just one chance. I was not sure then if Inglethorp was the criminal or not, but if he was I reasoned that he would not have the paper on him, but would have hidden it somewhere, and by enlisting the sympathy of the household I could effectually prevent his destroying it. He was already under suspicion, and by making the matter public I secured the services of about ten amateur detectives, who would be watching him unceasingly, and being himself aware of their watchfulness he would not dare seek further to destroy the document. He was therefore forced to depart from the house, leaving it in the spill vase."




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