This door led on to the raised dais, which, as I have mentioned, the heads of the house used to reserve for their own use. As it swung slowly back upon its hinges, I sat up in my chair, clutching at the arms, and staring with a horrified glare at the dark passage outside. Something was coming down it--something unformed and intangible, but still a something. Dim and shadowy, I saw it flit across the threshold, while a blast of ice-cold air swept down the room, which seemed to blow through me, chilling my very heart. I was aware of the mysterious presence, and then I heard it speak in a voice like the sighing of an east wind among pine-trees on the banks of a desolate sea. It said: "I am the invisible nonentity. I have affinities and am subtle. I am electric, magnetic, and spiritualistic. I am the great ethereal sighheaver. I kill dogs. Mortal, wilt thou choose me?" I was about to speak, but the words seemed to be choked in my throat; and before I could get them out, the shadow flitted across the hall and vanished in the darkness at the other side, while a long-drawn melancholy sigh quivered through the apartment. I turned my eyes toward the door once more, and beheld, to my astonishment, a very small old woman, who hobbled along the corridor and into the hall. She passed backward and forward several times, and then, crouching down at the very edge of the circle upon the floor, she disclosed a face, the horrible malignity of which shall never be banished from my recollection. Every foul passion appeared to have left its mark upon that hideous countenance. "Ha! ha!" she screamed, holding out her wizened hands like the talons of an unclean bird. "You see what I am. I am the fiendish old woman. I wear snuff-colored silks. My curse descends on people. Sir Walter was partial to me. Shall I be thine, mortal?" I endeavored to shake my head in horror; on which she aimed a blow at me with her crutch, and vanished with an eldrich scream. By this time my eyes turned naturally toward the open door, and I was hardly surprised to see a man walk in, of tall and noble stature. His face was deathly pale, but was surmounted by a fringe of dark hair which fell in ringlets down his back. A short pointed beard covered his chin. He was dressed in loose-fitting clothes, made apparently of yellow satin, and a large white ruff surrounded his neck. He paced across the room with slow and majestic strides. Then turning, he addressed me in a sweet, exquisitely modulated voice. "I am the cavalier," he remarked. "I pierce and am pierced. Here is my rapier. I clink steel. This is a bloodstain over my heart. I can emit hollow groans. I am patronized by many old conservative families. I am the original manor-house apparition. I work alone, or in company with shrieking damsels." He bent his head courteously, as though awaiting my reply, but the same choking sensation prevented me from speaking; and, with a deep bow, he disappeared.