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 glueing—any unusual gaping in the joints—would have sufficed to insure detection."
"I presume you looked to the mirrors, between the boards and the plates, and you probed the beds and the bed clothes, as well as the curtains and carpets."
"That of course; and when we had absolutely completed every particle of the furniture in this way, then we examined the house itself. We divided its entire surface into compartments, which we numbered, so that none might be missed; then we scrutinized each individual square inch throughout the premises, including the two houses immediately adjoining, with the microscope, as before."
"The two houses adjoining!" I exclaimed; "you must have had a great deal of trouble."
"We had; but the reward offered is prodigious!"
"You include the grounds about the houses?"
"All the grounds are paved with brick. They gave us comparatively little trouble. We examined the moss between the bricks, and found it undisturbed."
"You looked among D——'s papers, of course, and into the books of the library?"
"Certainly; we opened every package and parcel; we not only opened every book, but we turned over every leaf in each volume, not contenting ourselves with a mere shake, according to the fashion of some of our police officers. We also measured the thickness of every book cover, with the most accurate admeasurement, and applied to each the most jealous scrutiny of the microscope. Had any of the bindings been recently meddled with, it would have been utterly impossible that the fact should have escaped observation. Some five or six volumes, just from the hands of the binder, we carefully probed, longitudinally, with the needles."
"You explored the floors beneath the carpets?"
"Beyond doubt. We removed every carpet, and examined the boards with the microscope."
"And the paper on the walls?"
