mysterious. Having breakfasted betimes, he returned to his bedroom and locked himself in. Then he tied his new cane, handle downwards, to the leg of the dressing-table. Next, with the crucible-tongs, he drew the little bottle of musk from the brush-case, and, having assured himself, by sniffing at it, that the exterior was really free from odour, he withdrew the rubber cork. Then, slowly and with infinite care, he poured a few drops—perhaps half-a-teaspoonful—of the essence on the cotton-wool that bulged through the hole in the ferrule, watching the absorbent material narrowly as it soaked up the liquid. When it was saturated he proceeded to treat the knife in the same fashion, letting fall a drop of the essence on the wooden handle—which soaked it up readily. This done, he slid up the window and looked out. Immediately below was a tiny yard in which grew, or rather survived, a couple of faded laurel bushes. The body of the rat was nowhere to be seen; it had apparently been spirited away in the night. Holding out the bottle, which he still held, he dropped it into the bushes, flinging the rubber cork after it.
His next proceeding was to take a tube of vaseline from his dressing-bag and squeeze a small quantity onto his fingers. With this he thoroughly smeared the shoulder of the brush-case and the inside of the lid, so as to ensure an air-
