The fiftieth part of a line could not escape us. After the cabinets we took the chairs. The cushions we probed with fine long needles you have seen me employ. From the tables we removed the tops."
"Why so?"
"Sometimes the top of a table, or other similarly arranged piece of furniture, is removed by the person wishing to conceal an article; then the leg is excavated, the article deposited within the cavity, and the top replaced. The bottoms and tops of bedposts are employed in the same way."
"But could not the cavity be detected by sounding?" I asked.
"By no means, if, when the article is deposited, a sufficient wadding of cotton be placed around it. Besides, in our case we were obliged to proceed without noise."
"But you could not have removed—you could not have taken to pieces all articles of furniture in which it would have been possible to make a deposit in the manner you mention. A letter may be compressed into a thin spiral roll, not differing much in shape or bulk from a large knitting needle, and in this form it might be inserted into the rung of a chair, for example. You did not take to pieces all the chairs?"
"Certainly not; but we did better—we examined the rungs of every chair in the Hotel, and indeed, the jointings of every description of furniture, by the aid of a most powerful microscope. Had there been any traces of recent disturbance we should not have failed to detect it instantly. A single grain of gimlet-dust, for example, would have been as obvious as an apple. Any disorder in the gluing—any unusual gaping in the joints—would have sufficed to insure detection."
