Then the man saw that which had caused the animal to tremble, and the sight set him tingling just as it always did. A hundred yards up the ridge, sharp against the sky, commanding, watchful, stood the Captain. He had not seen or scented VB, for he looked in other directions, moving his head from point to point, scanning every nook of the country below him. Something mannish there was about that beast, a comprehensive, planned vigilance. Down below him in a sag fed the mares. As VB looked at that watcher he felt the lust to possess crawling up, surging through him, blotting out that other desire, that torment, making his breath congest, making his mouth dry. He tightened his cinch and mounted. The Captain did not see VB until the rider came clear of the cover in which he had halted. For the instant only, as the rushing horseman broke through the cedars, a scudding, fluttering object hurtling across the low brush, the black stallion stood as though his feet were imbedded in the rock under him, his head full toward the rushing rider, nose up, astonishment in the very angle of his stiff ears. Then those ears went flat; the sleek body pivoted on its dainty hind feet, and a scream of angered warning came from the long throat. Even as the Captain's front hoofs clawed the ground in his first leap, the mares were running. They drew close together, frightened by the abruptness of the alarm, scuttling away from the punishment they knew would be coming from their master if they wasted seconds. VB was possessed again. His reason told him that a single horseman had no chance in the world with that bunch, that he could not hope to keep up even long enough to scatter the band, that he would only run his mount down, good horse that he was. But the lust urged him on, tugging at his vitals, and he gave vent to his excitement in sharp screams of joy, the joy of the hunt--and the joy of honest attempt at supreme accomplishment. The dust trailed behind the bunch, enveloping the rushing Captain in a dun mantle, finally to be whipped away by the breeze. They tore down stiff sagebrush in their flight; and so great was the strain that their bellies skimmed incredibly close to the ground. VB's horse caught the spirit of the chase, as do all animals when they follow their kind. He extended himself to the last fiber, and with astonishment--a glad astonishment that brought a whoop of triumph--the boy saw that the mares were not drawing away--that he was crawling up on them! But the Captain! Ah, he was running away from the man who gave chase, was putting more distance between them at every thundering leap, was drawing closer to his slower mares, lip stretched back over his gleaming teeth, jaws working as he strained to reach them and make that band go still faster.