“About seven-fifteen, sir; directly after the hounds had started. I was careful to pick it up by the ring, and I wrapped it in the handkerchief at once.”
“Seven-fifteen,” said Thorndyke. “Less than half-an-hour after the murder. That is very singular. Do you observe the state of this handkerchief? There is not a mark on it. Not a trace of any bloodstain; which proves that when the knife was picked up, the blood on it was already dry. But things dry slowly, if they dry at all, in the saturated air of an autumn evening. The appearances seem to suggest that the blood on the knife was dry when it was thrown down. By the way, sergeant, what do you scent your handkerchief with?’”
“Scent, sir!” exclaimed the astonished officer in indignant accents; “me scent my handkerchief! No, sir, certainly not. Never used scent in my life, sir.”
Thorndyke held out the handkerchief, and the sergeant Sniffed at it incredulously. “It certainly does seem to smell of scent,” he admitted, “but it must be the knife.” The same idea having occurred to me, I applied the handle of the knife to my nose and instantly detected the sickly-sweet odour of musk.
“The question is,” said the inspector, when the two articles had been tested by us all, “was it the knife that scented the handkerchief or the handkerchief that scented the knife?”
“You heard what the sergeant said,” replied Thorndyke. “There was no scent on the handkerchief when the knife was wrapped in it. Do you know, inspector, this scent seems to me to offer a very curious suggestion. Consider the facts of the case: the distinct trail leading straight to Ellis, who is, nevertheless, found to be without a scratch or a spot of blood; the inconsistencies in the case that I pointed out in the train, and now this knife, apparently dropped with dried blood on it and scented with musk. To me it suggests a carefully-planned, coolly-premeditated crime. The murderer knew about the general’s bloodhounds and made use of them as a blind. He planted this knife, smeared with blood and tainted with musk, to furnish a scent. No doubt some object, also scented with musk, would be drawn over the ground to give the trail. It is only a suggestion, of course, but it is worth considering.”
“But, sir,” the inspector objected eagerly, “if the murderer had handled the knife, it would have scented him too.”
“Exactly; so, as we are assuming that the man is not a fool, we may assume that he did not handle it. He will have left it here in readiness, hidden in some place whence he could knock it down, say, with a stick, without touching it.”
“Perhaps in this very tree, sir,” suggested the sergeant, pointing to the oak.
“No,” said Thorndyke, “he would hardly have hidden in the tree where the knife had been. The hounds might have scented the place instead of following the trail at once. The most likely hiding-place for the knife is the one nearest the spot where it was found.” He walked over to the stone that marked the spot, and looking round, continued: “You see, that hornbeam is much the nearest, and its flat crown would be very convenient for the purpose—easily reached even by a short man, as he appears to be. Let us see if there are any traces of it. Perhaps you will give me a ‘back up,’ sergeant, as we haven’t a ladder.”