I did so and then turned, with no little excitement, to watch him as he examined the specimen. After a brief inspection he rose and waved his hand towards the microscope.
"Take a look at it, Jervis," he said, "and let us have your learned opinion."
I applied my eye to the instrument, and, moving the slide about, identified the constituents of the little mass of fluff. The ubiquitous cotton fibre was, of course, in evidence, and a few fibres of wool, but the most remarkable objects were two or three hairs—very minute hairs of a definite zigzag shape and having a flat expansion near the free end like the blade of a paddle.
"These are the hairs of some small animal," I said; "not a mouse or rat or any rodent, I should say. Some small insectivorous animal, I fancy. Yes! Of course! They are the hairs of a mole." I stood up, and, as the importance of the discovery flashed on me, I looked at my colleague in silence.
"Yes," he said, "they are unmistakable; and they furnish the keystone of the argument."
"You think that this is really the dead man's pipe, then?" I said.
"According to the law of multiple evidence," he replied, "it is practically a certainty. Consider the facts in sequence. Since there is no sign of mildew on it, this pipe can have been here only
