"A mouse," I said, and forgot my seediness; I was interested. "The little rascal! However did he contrive to seat himself in my pocket? and I have worn that overcoat all the morning!" But no--it was not a mouse. I saw something white poke its way out from under the lappet; and in another moment an object was revealed that, though revealed, I could not understand, nor could I distinguish what it was. Now roused by curiosity, I raised myself on my elbow. In doing this I made some noise, the bed creaked. Instantly the something dropped on the floor, lay outstretched for a moment, to recover itself, and then began, with the motions of a maggot, to run along the floor. There is a caterpillar called "The Measurer," because, when it advances, it draws its tail up to where its head is and then throws forward its full length, and again draws up its extremity, forming at each time a loop; and with each step measuring its total length. The object I now saw on the floor was advancing precisely like the measuring caterpillar. It had the colour of a cheese-maggot, and in length was about three and a half inches. It was not, however, like a caterpillar, which is flexible throughout its entire length, but this was, as it seemed to me, jointed in two places, one joint being more conspicuous than the other. For some moments I was so completely paralysed by astonishment that I remained motionless, looking at the thing as it crawled along the carpet--a dull green carpet with darker green, almost black, flowers in it. It had, as it seemed to me, a glossy head, distinctly marked; but, as the light was not brilliant, I could not make out very clearly, and, moreover, the rapid movements prevented close scrutiny. Presently, with a shock still more startling than that produced by its apparition at the opening of the pocket of my great-coat, I became convinced that what I saw was a finger, a human forefinger, and that the glossy head was no other than the nail. The finger did not seem to have been amputated. There was no sign of blood or laceration where the knuckle should be, but the extremity of the finger, or root rather, faded away to indistinctness, and I was unable to make out the root of the finger. I could see no hand, no body behind this finger, nothing whatever except a finger that had little token of warm life in it, no coloration as though blood circulated in it; and this finger was in active motion creeping along the carpet towards a wardrobe that stood against the wall by the fireplace. I sprang off the bed and pursued it. Evidently the finger was alarmed, for it redoubled its pace, reached the wardrobe, and went under it. By the time I had arrived at the article of furniture it had disappeared. I lit a vesta match and held it beneath the wardrobe, that was raised above the carpet by about two inches, on turned feet, but I could see nothing more of the finger.