"Now we come to Gavin Kingscote. He must have been a shrewd fellow--the sort of man that good detectives are made of. Also he must have been pretty unscrupulous. He had his suspicions about the genuineness of the diamond robbery, and kept his eyes open. What indications he had to guide him we don't know, but living in the same house a sharp fellow on the look-out would probably see enough. At any rate, they led him to the belief that the diamonds were in the thief's rooms, but not among his movables, or they would have been found after the arrest. Here was his chance. Challitt was out of the way for years, and there was plenty of time to take the house to pieces if it were necessary. So he changed into Challitt's rooms. "How long it took him to find the stones we shall never know. He probably tried many other places first, and, I expect, found the diamonds at last by pricking over the panels with a needle. Then came the problem of getting them out without attracting attention. He decided not to trust to the needle, which might possibly leave a stone or two undiscovered, but to split up each panel carefully into splinters so as to leave no part unexamined. Therefore he took measurements, and had a number of panels made by a joiner of the exact size and pattern of those in the room, and announced to his landlady his intention of painting her panels with a pretty design. This to account for the wet paint, and even for the fact of a panel being out of the wall, should she chance to bounce into the room at an awkward moment. All very clever, eh?" "Very." "Ah, he was a smart man, no doubt. Well, he went to work, taking out a panel, substituting a new one, painting it over, and chopping up the old one on the quiet, getting rid of the splinters out of doors when the booty had been extracted. The decoration progressed and the little heap of diamonds grew. Finally, he came to the last panel, but found that he had used all his new panels and hadn't one left for a substitute. It must have been at some time when it was difficult to get hold of the joiner--Bank Holiday, perhaps, or Sunday, and he was impatient. So he scraped the paint off, and went carefully over every part of the surface--experience had taught him by this that all the holes were of the same sort--and found one diamond. He took it out, refilled the hole with putty, painted the old panel and put it back. _These_ are pieces of that old panel--the only old one of the lot.