tree. Then, parting the branches, he stepped onto the ledge and disappeared into the central hollow.
When he re-appeared he held in his hands two very singular objects: a pair of iron crucible-tongs and an artist's brush-case of black-japanned tin. The former article he handed down to me, but the brush-case he held carefully by its wire handle as he dropped to the ground.
"The significance of these things is, I think, obvious," he said. "The tongs were used to handle the knife with and the case to carry it in, so that it should not scent his clothes or bag. It was very carefully planned."
"If that is so," said the inspector, "the inside of the case ought to smell of musk."
"No doubt," said Thorndyke; "but before we open it, there is a rather important matter to be attended to. Will you give me the Vitogen powder, Jervis?"
I opened the canvas-covered "research case" and took from it an object like a diminutive pepper-caster—an iodoform dredger in fact—and handed it to him. Grasping the brush-case by its wire handle, he sprinkled the pale yellow powder from the dredger freely all round the pull-off lid, tapping the top with his knuckles to make the fine particles spread. Then he blew off the superfluous powder, and the two police officers gave a
