"Very well," he answered; "but if you insist upon this, I shall, on behalf of Cicero, claim the stake of your voluntary wager, which means that I must first, by natural though violent means, release your soul from your body." So saying he arose, drew from an inner pocket a long, keen knife, the blade of which quiveringly glistened as he laid it upon the table. Moving his chair so as to be within easy reach of the gleaming weapon, he sat down, and again regarded me with the same quiet composure I had noted, and which was fast dispelling my first impression concerning his sanity. I was not prepared for his strange action; in truth, I was not prepared for anything; my mind was confused concerning the whole night's doings, and I was unable to reason clearly or consecutively, or even to satisfy myself what I did think, if indeed I thought at all. The sensation of fear, however, was fast leaving me; there was something reassuring in my unbidden guest's perfect ease of manner, and the mild, though searching gaze of his eyes, which were wonderful in their expression. I began to observe his personal characteristics, which impressed me favorably, and yet were extraordinary. He was nearly six feet tall, and perfectly straight; well proportioned, with no tendency either to leanness or obesity. But his head was an object from which I could not take my eyes,--such a head surely I had never before seen on mortal shoulders. The chin, as seen through his silver beard, was rounded and well developed, the mouth straight, with pleasant lines about it, the jaws square and, like the mouth, indicating decision, the eyes deep set and arched with heavy eyebrows, and the whole surmounted by a forehead so vast, so high, that it was almost a deformity, and yet it did not impress me unpleasantly; it was the forehead of a scholar, a profound thinker, a deep student. The nose was inclined to aquiline, and quite large. The contour of the head and face impressed me as indicating a man of learning, one who had given a lifetime to experimental as well as speculative thought. His voice was mellow, clear, and distinct, always pleasantly modulated and soft, never loud nor unpleasant in the least degree. One remarkable feature I must not fail to mention--his hair; this, while thin and scant upon the top of his head, was long, and reached to his shoulders; his beard was of unusual length, descending almost to his waist; his hair, eyebrows, and beard were all of singular whiteness and purity, almost transparent, a silvery whiteness that seemed an aureolar sheen in the glare of the gaslight. What struck me as particularly remarkable was that his skin looked as soft and smooth as that of a child; there was not a blemish in it. His age was a puzzle none could guess; stripped of his hair, or the color of it changed, he might be twenty-five,--given a few wrinkles, he might be ninety. Taken altogether, I had never seen his like, nor anything approaching his