Since the day that he had given Margaret his promise to make good, Gardley had been regularly employed by Mr. Rogers, looking after important matters of his ranch. Before that he had lived a free and easy life, working a little now and then when it seemed desirable to him, having no set interest in life, and only endeavoring from day to day to put as far as possible from his mind the life he had left behind him. Now, however, all things became different. He brought to his service the keen mind and ready ability that had made him easily a winner at any game, a brave rider, and a never-failing shot. Within a few days Rogers saw what material was in him, and as the weeks went by grew to depend more and more upon his advice in matters. There had been much trouble with cattle thieves, and so far no method of stopping the loss or catching the thieves had been successful. Rogers finally put the matter into Gardley's hands to carry out his own ideas, with the men of the camp at his command to help him, the camp itself being only a part of Rogers's outlying possessions, one of several such centers from which he worked his growing interests. Gardley had formulated a scheme by which he hoped eventually to get hold of the thieves and put a stop to the trouble, and he was pretty sure he was on the right track; but his plan required slow and cautious work, that the enemy might not suspect and take to cover. He had for several weeks suspected that the thieves made their headquarters in the region of Old Ouida's Cabin, and made their raids from that direction. It was for this reason that of late the woods and trails in the vicinity of Ouida's had been secretly patrolled day and night, and every passer-by taken note of, until Gardley knew just who were the frequenters of that way and mostly what was their business. This work was done alternately by the men of the Wallis camp and two other camps, Gardley being the head of all and carrying all responsibility; and not the least of that young man's offenses in the eyes of Rosa Rogers was that he was so constantly at her father's house and yet never lifted an eye in admiration of her pretty face. She longed to humiliate him, and through him to humiliate Margaret, who presumed to interfere with her flirtations, for it was a bitter thing to Rosa that Forsythe had no eyes for her when Margaret was about. When the party from the fort rode homeward that Sunday after the service at the school-house, Forsythe lingered behind to talk to Margaret, and then rode around by the Rogers place, where Rosa and he had long ago established a trysting-place.