I endeavored to deprecate the value of my interference and to moderate his expressions of gratitude; but he would have none of it, and, leaping to his feet, began to pace to and fro, expatiating upon what he extravagantly termed my bravery and unselfishness, and insisting upon his tremendous obligation to me. He was manifestly in earnest; but all at once habit asserted itself, the ruling passion came to the fore, and a trifle “light as air” made “confirmation strong as proof of Holy Writ.” When he first began to move a memory flashed over me, but, as those beautiful, restless white hands added their evidence, assurance became doubly sure. I could see my demure, pretty little client impersonating this man, and I knew, despite the dyed hair and the shaven beard, that I had found the missing witness. But I had found something else. I had found a man suffering from a chronic dementia. Whether his derangement was general or merely monomania, I was at a loss to determine. If the former, he was not competent as a witness for either side. If the latter, the special form and degree of alienation might or might not militate against his testimony. I was impelled to take him unawares, and so I said suddenly: “Dr. Bently, do you remember Mrs. Abbott, the daughter of your former patient, Mrs. Johnstone, of Laneville?” If he started or showed surprise or annoyance, it was imperceptible; but he glanced with smiling complaisance at his nails as he came over to me, and, touching my forehead, remarked, with most irritating suavity: “My dear fellow, I fear you are feverish. My name is Charles Chester Chickering. I never was in Laneville, I never had a patient named Johnstone, and I have no recollection whatever of anyone by the name of Abbott.” He looked straight at me as he uttered these falsehoods, and his tone was like velvet. There was the flicker of an amused smile on his mouth, but his eyes were hard and cold as blued steel, the contracted pupils shining like black pinheads. I stared back at him, and presently he shifted his gaze from my face to his own right hand, which he was holding out in front of him, and again that abominable, self-satisfied smirk appeared. I was filled with boundless contempt for this man I had almost begun to pity, and as I rose from the couch and began to speak I could fairly taste the bitterness of the words I flung at him: “Dr. or Mr. Bernard Brice Bently, Charles Chester Chickering—or whatever your infernal, alliterative _alias_ may be—I deeply regret that I should have saved you from the death I have no doubt you richly deserved, and I earnestly hope that you may be punished for your crime of helping to ruin a poor little woman and two innocent children. And, by the living God! I will do all in my power to bring you to——”