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."
The sergeant assented with a faint grin, and stooping beside the tree in an attitude suggesting the game of leapfrog, placed his hands firmly on his knees. Grasping a stout branch, Thorndyke swung himself up on the sergeant's broad back, whence he looked down into the crown of the
