After striking the bottom of the slope he rode cut upon a broad level that stretched away for half a mile. He made better time here and had almost covered half the width of the plain when two more reports reached his ears. He was close enough now to hear them distinctly and it seemed to him that they sounded muffled. He halted the pony and sat stiffly in the saddle, his gaze on the cabin. Then he saw a thin stream of blue-white smoke issue from the doorway and curl lazily upward. A grave doubt assailed him. No cowboy would be likely to exhibit his skill with a weapon in the cabin! Nellie's visitor must be an unwelcome one! The pony felt the sudden spurs and raced like a whirlwind over the remaining stretch of plain. Hollis had become suddenly imbued with a suspicion that brought an ashen pallor to his face and an awful rage into his heart. He slid his pony down one side of a steep arroyo, sent it scrambling up the other side, jumped it over some rocks that littered the rise, spurred savagely through a little basin, and reaching the edge of the porch, dismounted and bounded to the door. He saw two figures--Nellie Hazelton and a man. He saw the man's fingers gripping the girl's throat and the lust of murder surged over and blinded him. In the dusk that had fallen he could only dimly see the man's head and he swung his right fist at it, putting every ounce of his strength into the blow. He felt the fist strike, realized that it had glanced, and tried to recover for a second blow. But the terrific swing had carried him off his balance. He whirled clear around, slipped, and came down to the floor flat on his face. He was up in an instant, however, his brain afire with rage, his muscles tingling with eagerness. He did not think of the gun at his hip, for the lust of murder was in his soul and he wanted only to hit the man--to seize him and tear him apart--to crush and smash the vile hands that he had seen at the girl's throat. Five feet from him, facing him, on his hands and knees and scrambling to rise, was the man. He recognized Yuma, and even as he bounded forward the latter gained his feet and tugged at his gun-holster. The weapon had not yet cleared the holster when Hollis was upon him. He struck again with his right fist and missed, crashing against Yuma in his eagerness and carrying him down to the floor with a force that shook the cabin. As they fell Hollis felt a sharp, agonizing pain in his left wrist, from which the splints had been only recently removed, and the hand hung limp at his side, entirely useless.