As I shivered and brooded on the casting of that brain-blasting shadow, I knew that I had at last pried out one of earth's supreme horrors--one of those nameless blights of outer voids whose faint demon scratchings we sometimes hear on the farthest rim of space, yet from which our own finite vision has given us a merciful immunity. The shadow I had seen, I hardly dared to analyze or identify. Something had lain between me and the window that night, but I shuddered whenever I could not cast off the instinct to classify it. If it had only snarled, or bayed, or laughed titteringly--even that would have relieved the abysmal hideousness. But it was so silent. It had rested a heavy arm or foreleg on my chest.... Obviously it was organic, or had once been organic.... Jan Martense, whose room I had invaded, was buried in the graveyard near the mansion.... I must find Bennett and Tobey, if they lived ... why had it picked them, and left me for the last?... Drowsiness is so stifling, and dreams are so horrible.... In a short time I realized that I must tell my story to someone or break down completely. I had already decided not to abandon the quest for the lurking fear, for in my rash ignorance it seemed to me that uncertainty was worse than enlightenment, however terrible the latter might prove to be. Accordingly I revolved in my mind the best course to pursue; whom to select for my confidences, and how to track down the thing which had obliterated two men and cast a nightmare shadow. My chief acquaintances at Lefferts Corners had been the affable reporters, of whom several still remained to collect final echoes of the tragedy. It was from these that I determined to choose a colleague, and the more I reflected the more my preference inclined toward one Arthur Munroe, a dark, lean man of about thirty-five, whose education, taste, intelligence, and temperament all seemed to mark him as one not bound to conventional ideas and experiences. On an afternoon in early September Arthur Munroe listened to my story. I saw from the beginning that he was both interested and sympathetic, and when I had finished he analyzed and discussed the thing with the greatest shrewdness and judgment. His advice, moreover, was eminently practical; for he recommended a postponement of operations at the Martense mansion until we might become fortified with more detailed historical and geographical data. On his initiative we combed the countryside for information regarding the terrible Martense family, and discovered a man who possessed a marvelously illuminating ancestral diary. We also talked at length with such of the mountain mongrels as had not fled from the terror and confusion to remoter slopes, and arranged to precede our culminating task--the exhaustive and definitive examination of the mansion in the light of its detailed history--with an equally exhaustive and definitive examination of spots associated with the various tragedies of squatter legend.