A cold shudder ran through natives and visitors alike, and every ear seemed strained in a kind of instinctive, unconscious listening. Armitage, now that he had actually come upon the horror and its monstrous work, trembled with the responsibility he felt to be his. Night would soon fall, and it was then that the mountainous blasphemy lumbered upon its eldritch course. Negotium perambulans in tenebris. . . . The old librarian rehearsed the formulæ he had memorized, and clutched the paper containing the alternative ones he had not memorized. He saw that his electric flashlight was in working order. Rice, beside him, took from a valise a metal sprayer of the sort used in combating insects; whilst Morgan uncased the big-game rifle on which he relied despite his colleague's warnings that no material weapon would be of help.