There came a sound of faint and muffled coughing, What with my recent awakening and the panic at my heart, I could not claim that my vision was true; but across this moonbeam passed a sort of grey streak, for all the world as though some long thin shape had been withdrawn, snakelike, from the room, through the open window.... From somewhere outside the house, and below, I heard the cough again, followed by a sharp cracking sound like the lashing of a whip. I depressed the switch, flooding the room with light, and as I leapt forward to the bed a word picture of what I had seen formed in my mind; and I found that I was thinking of a grey feather boa. "Smith!" I cried (my voice seemed to pitch itself, unwilled, in a very high key), "Smith, old man!" He made no reply, and a sudden, sorrowful fear clutched at my heart-strings. He was lying half out of bed flat upon his back, his head at a dreadful angle with his body. As I bent over him and seized him by the shoulders, I could see the whites of his eyes. His arms hung limply, and his fingers touched the carpet. "My God!" I whispered, "what has happened?" I heaved him back on to the pillow, and looked anxiously into his face. Habitually gaunt, the flesh so refined away by the consuming nervous energy of the man as to reveal the cheekbones in sharp prominence, he now looked truly ghastly. His skin was so sun-baked as to have changed constitutionally; nothing could ever eradicate that tan. But to-night a fearful greyness was mingled with the brown, his lips were purple ... and there were marks of strangulation upon the lean throat--ever darkening weals of clutching fingers. He began to breathe stertorously and convulsively, inhalation being accompanied by a significant gurgle in the throat. But now my calm was restored in face of a situation which called for professional attention. I aided my friend's laboured respirations by the usual means, setting to work vigorously; so that presently he began to clutch at his inflamed throat which that murderous pressure had threatened to close. I could hear sounds of movements about the house, showing that not I alone had been awakened by those hoarse screams. "It's all right, old man," I said, bending over him: "brace up!" He opened his eyes--they looked bleared and bloodshot--and gave me a quick glance of recognition. "It's all right, Smith!" I said--"no! don't sit up; lie there for a moment." I ran across to the dressing-table, whereon I perceived his flask to lie, and mixed him a weak stimulant with which I returned to the bed. As I bent over him again, my housekeeper appeared in the doorway, pale and wide-eyed. "There is no occasion for alarm," I said over my shoulder; "Mr. Smith's nerves are overwrought and he was awakened by some disturbing dream. You can return to bed, Mrs. Newsome."