these must have left their mark on the dirty key. So I turned back to the idol. This was the spot the intruder had made for in his retreat, and the figure had been brought into the place the very morning of the murder. Also, things had disappeared from its vicinity at Copleston's. More—it was a large thing. What if it were hollow? One has heard of such things having been invented by priests anxious for certain effects. Could not a thief smuggle himself in that way?
"The suggestion was a little startling, for if it were the right one the man might be hiding there at that moment. I gave the thing half an hour's examination, and in the end found what I have shown you. It was not the sort of thing one would have found out without looking for it. Look at it even now. Although you have seen it open, you couldn't point to the joints."
Dorrington opened it again. "Once open," he went on, "the thing was pretty plain. Here is the rag—perhaps it was Castro's pocket-handkerchief—used to wipe the weapon. It is stained all over, and cut, as you will observe, by the sharp edge. Also, you may see a crumb or two—Slackjaw had brought food with him, in case of a long
