I do not know how long we continued groping through the mist. It may have been half an hour, or an hour; certainly, it seemed the better part of a day. But as Damon and I picked our path between the boulders among the enfolding vapors, despair was gradually settling over us both, and we felt as if some malign spirit had walled us off from the world. Even so, I cannot explain how we opened the door for the greatest horror of all. Perhaps it was only that Damon was displaying his usual recklessness; perhaps that the fog had driven us in too much upon ourselves. All I know is that, looking up after an absent-minded revery, I received a bewildering shock--the mist was hemming me in almost at arm's length, and Damon was not to be seen! For a moment I was too dazed to cry out. My mind was filled with the fantastic ideas that come to a man at such a crisis. Had my companion stepped over a precipice? Had he been crushed by a dislodged boulder? Had some prowling beast fallen upon him? As these questions shot over me, I was startled to hear my name shouted in a familiar voice. But the words seemed to issue from far away, and I had only the vaguest idea of their direction. "Damon! Damon!" I shouted back, in mingled hope and dismay. "Where are you?" "Here! Here, Prescott! Here!" came the voice, after a second or two. But I was still mystified as to the direction. Yet, in my excitement, I cried, "I'm coming!" and started off on what I imagined to be the proper course. At intervals the calling continued. Damon's voice did not seem to draw nearer, but did not seem to grow more remote; and several times, by way of desperate experiment, I changed my direction--which only increased my confusion. Now I would be sure that the voice cried from my right, and now that it shrilled from my left; at first I thought that it came from beneath me, but before long I felt that its source was above. And as I went fumbling through the fog, anxiety gave way to panicky impatience, and the slim remnants of my wits deserted me. The climax came when, after forcing my way through a cluster of jagged rocks that bruised my arms and legs and tore my clothes, I found myself at the base of a cliff that shot upward abruptly out of sight. From somewhere above, I felt sure, I heard Damon's voice calling, hoarse from overstraining and plaintive with fear. And at the thought that an unscalable wall divided us, I behaved like a trapped animal; heedless of the abysses beneath, I started hastily along the base of the cliff in what I supposed to be Damon's direction. But again I had miscalculated. When I next heard my friend's voice, it was much fainter ... growing ghostly faint and remote; and continued to grow fainter still, until it was no more than a murmur borne across far distances. And now, when I screamed his name in a cracked and broken way, the only answer was in the echoes that reverberated along the mountainside, with thin and hollow notes like the mockery of fiends.