Pierre had thus far conducted his operations with the most business-like coolness, and in much the same spirit that he would have exhibited had he been breaking one of Mr. Winters's wild horses to the saddle. He had smiled at times, as he would have smiled at the efforts of the horse to escape, and the thought that he should fail in his object had never entered his head. He had been certain that he could frighten or torture Frank into revealing the hiding-place of the office key; but now he began to believe that he had reckoned without his host. He was astonished and enraged at the wonderful firmness displayed by his prisoner. He had never imagined that this sixteen-year-old boy would prove an obstacle too great to be overcome.
"You are the most obstinate colt I ever tried to manage," said Pierre, in a voice choked with passion; "but I'll break one of two things—your spirit or your neck; it makes no difference to me which."
Without waiting to give his prisoner time to recover his power of speech, the Ranchero wound the lariat around his hands, and was about to pull him up again, when he was startled by the clatter of a horse's hoofs in the court.
The sound worked a great change in Pierre. As if by magic, the savage scowl faded from his face, and he stood for an instant the very picture of terror. All thoughts of the twelve thousand dollars, and the vengeance he had determined to wreak upon his prisoner, were banished from his mind, and gave place to the desire to escape from the house as secretly and speedily as possible.
"Who can that be?" he muttered, dropping the lasso, and throwing a frightened glance ever his shoulder toward the door.
"I'm sure I don't know," said Frank, speaking with the greatest difficulty; "and I don't care who it is, if he will only make a prisoner of you."
The Ranchero scowled fiercely upon his plucky captive, hesitated a moment, as if he had half a mind to be revenged upon him before he left the house, and then, catching up his knife, and extinguishing the lamp, he jerked open one of the windows, and disappeared in the darkness.
Frank was no less astonished than delighted at his unexpected deliverance. He tried to shout, to attract the attention of the unknown horseman, but all his efforts were unavailing. His attempts to release his hands, however, which he commenced the instant the Ranchero left the room, were more successful. Pierre's carelessness in tying the knots was a point in his favor then; for, in less time than it takes to record the fact, Frank was free. He threw the noose off his neck, pulled the lasso down from the hook, and hastily coiling it up in one hand, he ran to the place where he had left his rifle, fully determined that the robber should not escape from the ranch without an attempt on his part to capture him. His rifle was gone. The Ranchero had caught it up as he bounded through the window, thinking he might find use for it, in case he should happen to run against the visitor in the dark.
Frank looked upon the loss of his rifle as a great misfortune; for, not only did he believe the weapon lost to him forever, but he was powerless to effect the capture of the Ranchero, even if he succeeded in finding him. However, he did not waste time in vain regrets. He sprang through the window, and, running around the house, entered the court, to look for the horseman whose timely arrival had saved his life. He went as far as the archway that led into the court, and there he suddenly paused, and the blood rushed back upon his heart, leaving his face as pale as death itself. He had told the Ranchero that a dozen such men as he could not overcome his uncle; but the scene before him belied his words. Flat upon his back, in the middle of the court, lay Mr. Winters, with Pierre Costello kneeling on his breast, one hand grasping his victim's throat, and the other holding aloft his murderous-looking bowie, whose bright blade glistened in the moonlight like burnished silver.