When she had gone, I went upstairs to the sitting-room and turned over the books, but I couldn't, to save my life, force an interest in printed romances after meeting Mrs. Vanderbridge and remembering the mystery that surrounded her. I wondered if "the Other One," as Hopkins called her, lived in the house, and I was still wondering this when the maid came in and began putting the table to rights. "Do they dine out often?" I asked. "They used to, but since Mr. Vanderbridge hasn't been so well, Mrs. Vanderbridge doesn't like to go without him. She only went tonight because he begged her to." She had barely finished speaking when the door opened, and Mr. Vanderbridge came in and sat down in one of the big velvet chairs before the wood fire. He had not noticed us, for one of his moods was upon him, and I was about to slip out as noiselessly as I could when I saw that the Other One was standing in the patch of firelight on the hearth rug. I had not seen her come in, and Hopkins evidently was still unaware of her presence, for while I was watching, I saw the maid turn towards her with a fresh log for the fire. At the moment it occurred to me that Hopkins must be either blind or drunk, for without hesitating in her advance, she moved on the stranger, holding the huge hickory log out in front of her. Then, before I could utter a sound or stretch out a hand to stop her, I saw her walk straight through the gray figure and carefully place the log on the andirons. So she isn't real, after all, she is merely a phantom, I found myself thinking, as I fled from the room, and hurried along the hall to the staircase. She is only a ghost, and nobody believes in ghosts any longer. She is something that I know doesn't exist, yet even, though she can't possibly be, I can swear that I have seen her. My nerves were so shaken by the discovery that as soon as I reached my room I sank in a heap on the rug, and it was here that Hopkins found me a little later when she came to bring me an extra blanket. "You looked so upset I thought you might have seen something," she said. "Did anything happen while you were in the room?" "She was there all the time--every blessed minute. You walked right through her when you put the log on the fire. Is it possible that you didn't see her?" "No, I didn't see anything out of the way." She was plainly frightened. "Where was she standing?" "On the hearthrug in front of Mr. Vanderbridge. To reach the fire you had to walk straight through her, for she didn't move. She didn't give way an inch." "Oh, she never gives way. She never gives way living or dead." This was more than human nature could stand. "In Heaven's name," I cried irritably, "who is she?"