His voice came during a lull that followed the applause. It reached Rosalind, full and resonant. It carried to the rider of the black horse, and glancing sidelong at him, Rosalind saw his face whiten under the deep tan upon it. It carried, too, to the other side of the street, and the girl saw faces grow suddenly tense; noted the stiffening of bodies. The flat, ominous silence that followed was unreal and oppressive. Out of it came the rider's voice as he urged the black to a point within three or four paces of Corrigan and sat in the saddle, looking at him. And now for the first time Rosalind had a clear, full view of the rider's face and a quiver of trepidation ran over her. For the lean jaws were corded, the mouth was firm and set--she knew his teeth were clenched; it was the face of a man who would not be trifled with. His chin was shoved forward slightly; somehow it helped to express the cold humor that shone in his narrowed, steady eyes. His voice, when he spoke to Corrigan, had a metallic quality that rang ominously in the silence that had continued: "Back up your play or take it back," he said slowly. Corrigan had not changed his position. He stared fixedly at the rider; his only sign of emotion over the latter's words was a quickening of the eyes. He idly tapped with his fingers on the sleeve of his khaki shirt, where the arm passed under them to fold over the other. His voice easily matched the rider's in its quality of quietness: "My conversation was private. You are interfering without cause." Watching the rider, filled with a sudden, breathless premonition of impending tragedy, Rosalind saw his eyes glitter with the imminence of physical action. Distressed, stirred by an impulse to avert what threatened, she took a step forward, speaking rapidly to Corrigan: "Mr. Corrigan, this is positively silly! You know you were hardly discreet!" Corrigan smiled coldly, and the girl knew that it was not a question of right or wrong between the two men, but a conflict of spirit. She did not know that hatred had been born here; that instinctively each knew the other for a foe, and that this present clash was to be merely one battle of the war that would be waged between them if both survived. Not for an instant did Corrigan's eyes wander from those of the rider. He saw from them that he might expect no further words. None came. The rider's right hand fell to the butt of the pistol that swung low on his right hip. Simultaneously, Corrigan's hand dropped to his hip pocket. Rosalind saw the black horse lunge forward as though propelled by a sudden spring. A dust cloud rose from his hoofs, and Corrigan was lost in it. When the dust swirled away, Corrigan was disclosed to the girl's view, doubled queerly on the ground, face down. The black horse had struck him with its shoulder--he seemed to be badly hurt.