But he interrupted eagerly: "There is a carriage at the door; we thought you might not have your phaeton ready." I had noticed the carriage. "Very well," said I. "I will go, but first let me write a line----" "O sir," the man broke in pleadingly, "do not wait for anything. She is really very bad, and I heard her calling for you as I ran out of the house." "She had her voice then?" I ventured, somewhat distrustful of the whole thing and yet not knowing how to refuse the man, especially as it was absolutely necessary for me to see Mrs. Warner that night and get her consent to my departure before I could think of making further plans. So, leaving word for Richter to be sure and wait for me if he came home before I did, I signified to Mrs. Warner's messenger that I was ready to go with him, and immediately took a seat in the carriage which had been provided for me. The man at once jumped up on the box beside the driver, and before I could close the carriage door we were off, riding rapidly down Seventh Avenue. As we went the thought came, "What if Mrs. Warner will not let me off!" But I dismissed the fear at once, for this patient of mine is an extremely unselfish woman, and if she were not too ill to grasp the situation, would certainly sympathize with the strait I was in and consent to accept Richter's services in place of my own, especially as she knows and trusts him. When the carriage stopped it was already dark and I could distinguish little of the house I entered, save that it was large and old and did not look like an establishment where a man servant would be likely to be kept. "Is Mrs. Warner here?" I asked of the man who was slowly getting down from the box. "Yes, sir," he answered quickly; and I was about to ring the bell before me, when the door opened and a young German girl, courtesying slightly, welcomed me in, saying: "Mrs. Warner is upstairs, sir; in the front room, if you please." Not doubting her, but greatly astonished at the barren aspect of the place I was in, I stumbled up the faintly lighted stairs before me and entered the great front room. It was empty, but through an open door at the other end I heard a voice saying: "He has come, madam;" and anxious to see my patient, whose presence in this desolate house I found it harder and harder to understand, I stepped into the room where she presumably lay. Alas! for my temerity in doing so; for no sooner had I crossed the threshold than the door by which I had entered closed with a click unlike any I had ever heard before, and when I turned to see what it meant, another click came from the opposite side of the room, and I perceived, with a benumbed sense of wonder, that the one person whose somewhat shadowy figure I had encountered on entering had vanished from the place, and that I was shut up alone in a room without visible means of egress.