They heaved with might and main, and Corazón flopped in the dust. Quick as a cat, he sprang upright and bolted; but again they downed him, and, while Reb held the head by straddling the neck, his confederate twined dexterously with a stake-rope. There lay Corazón, helpless and almost spent, trussed up like a sheep for market: they had hog-tied him. It was the buster who put the hackamore on his head. Very deliberately he moved. Corazón sensed confidence in the touch of his fingers; they spoke a language to him, and he was soothed by the sureness of superiority they conveyed. He lay quiet. Then Reb incautiously shifted his position, and the horse heaved and raised his head, banging Mullins across the ear. The buster’s senses swam, but instead of flying into a rage, he became quieter, more deliberate; in his cold eyes was a vengeful gleam, and dangerous stealth lurked in his delicate manipulation of the strands. An excruciating pain shot through the sorrel’s eye: Mullins had gouged him. “Let him up.” It was the buster again, atop the bay, making the rope fast with a double half-hitch over the horn of the saddle. Corazón arose, dazed and very sick. But his spirit was unbreakable. Again and again he strove to tear loose, rearing, falling back, plunging to the end of the rope until he was hurled off his legs to the ground. When he began to weary, Mullins encouraged him to fight, that he might toss him. “I’ll learn you what this rope means,” he remarked, as the broncho scattered the dust for the ninth time, and remained there, completely done up. In deadly fear of his slender tether, yet alert to match his strength against it once more, should opportunity offer, Corazón followed the buster quietly enough when he rode out into the open. Beside a sturdy mesquite bush that grew apart from its brethren, Mullins dismounted and tied the sorrel. As a farewell he waved his arms and whooped. Of course Corazón gathered himself and leaped--leaped to the utmost that was in him, so that the bush vibrated to its farthest root; and of course he hit the earth with a jarring thump that temporarily paralyzed him. Mullins departed to put the thrall of human will on others. Throughout the afternoon, and time after time during the interminable night, the sorrel tried to break away, but with each sickening failure he grew more cautious. When he ran against the rope now, he did not run blindly to its limit, but half wheeled, so that when it jerked him back he invariably landed on his feet. Corazón was learning hard, but he was learning. And what agonies of pain and suspense he went through!--for years a free rover, and now to be bound thus, by what looked to be a mere thread, for he knew not what further tortures! He sweated and shivered, seeing peril in every shadow. When a coyote slunk by with tongue lapping hungrily over his teeth, the prisoner almost broke his neck in a despairing struggle to win freedom.