Dave's opportunity came sooner than he expected. After the departure of the Hardys things at the old ranch were as both father and son had predicted, very different. They found themselves on a sort of good behaviour; a behaviour which, unhappily excited in each other grave suspicions as to purpose. Between these two men rude courtesies or considerations of any kind had been so long forgotten that attempts to reintroduce them resulted in a sort of estrangement more dangerous than the old open hostility. The tension steadily increased, and both looked forward to the moment when something must give way. For several weeks the old man remained entirely sober, but the call of the appetite in him grew more and more insistent as the days went by, and at last came the morning when Dave awoke to find him gone. He needed no second guess; the craving had become irresistible and his father had ridden to town for the means to satisfy it. The passing days did not bring his return, but this occasioned no anxiety to Dave. In the course of a carouse his father frequently remained away for weeks at a stretch, and at such times it was Dave's custom to visit the boys on a ranch a dozen miles over the foothills to the southward. These boys had a sister, and what was more natural than that Dave should drown his loneliness in such company? But this time he did not ride southward over the hills. He moped around the ranch buildings, sat moodily by the little stream, casting pebbles in the water, or rode over the old trails on which she had so often been his companion. The season was bright with all the glory of the foothill September; the silver dome of heaven, cloudless morning and noon, ripened with the dying day into seas of gold on which floated cloud-islands of purple and amethyst, and through the immeasurable silence of the night moon and stars bathed the deep valleys in celestial effulgence. But in the heart of the boy was neither sun, nor moon, nor stars, but only the black gulfs of loneliness from which his light had gone out. Then the old man's horse came home. Dave saw it coming up the trail, not running wildly, but with nervous gallop and many sidelong turnings of the head. As the boy watched he found a strange emptiness possess him; his body seemed a phantom on which his head hung over-heavy. He spoke to the horse, which pulled up, snorting, before him; noted the wet neck and flanks, and at last the broken stirrup. Then, slowly and methodically, and still with that strange sensation of emptiness, he saddled his own horse and set out on the search. . . .