"Kingscote returns, and Challitt accuses him of taking the stones. Kingscote is contemptuous--doesn't care for Challitt, because he knows he is powerless, being the original thief himself; besides, knows there is no evidence, since the diamonds are sold and dispersed long ago. Challitt offers to divide the plunder with him--Kingscote laughs and tells him to go; probably threatens to throw him out, Challitt being the smaller man. Gillard, at the open window, hears this, steps in behind, and quietly knocks him on the head. The rest follows as a matter of course. They fasten the window and shutters, to exclude observation; turn over all the drawers, etc., in case the jewels are there; go to the best bedroom and try there, and so on. Failing (and possibly being disturbed after a few hours' search by the noise of the acquisitive gardener), Gillard, with the instinct of an old thief, determines they shan't go away with nothing, so empties Kingscote's pockets and takes his watch and chain and so on. They go out by the front door and shut it after them. _Voilà tout._" I was filled with wonder at the prompt ingenuity of the man who in these few hours of hurried inquiry could piece together so accurately all the materials of an intricate and mysterious affair such as this; but more, I wondered where and how he had collected those materials. "There is no doubt, Hewitt," I said, "that the accurate and minute application of what you are pleased to call your common sense has become something very like an instinct with you. What did you deduce from? You told me your conclusions from the examination of Ivy Cottage, but not how you arrived at them." "They didn't leave me much material downstairs, did they? But in the bedroom, the two drawers which the thieves found locked were ransacked--opened probably with keys taken from the dead man. On the floor I saw a bent French nail; here it is. You see, it is twice bent at right angles, near the head and near the point, and there is the faint mark of the pliers that were used to bend it. It is a very usual burglars' tool, and handy in experienced hands to open ordinary drawer locks. Therefore, I knew that a professional burglar had been at work. He had probably fiddled at the drawers with the nail first, and then had thrown it down to try the dead man's keys.