On the open range men usually stop for a word or two when they meet, but this one did not. As he approached Stratton at a rapid speed there was a brief, involuntary movement as if he meant to pull up and then changed his mind. The next moment he had whirled past with a careless, negligent gesture of one hand and a keen, penetrating, questioning stare from a pair of hard black eyes. Buck glanced over one shoulder at the flying dust-cloud and pursed his lips. "Wonder if that's the mysterious Tex?" he pondered, urging his horse forward. "Black eyes and red cheeks, all right. He's a good looking scoundrel--too darn good looking for a man. All the same, I can't say it was a case of love at first sight." Unconsciously his right hand dropped to the holster at his side, the fingers caressing for an instant the butt of his Colt. He had set out on his errand of exposure with an angry impulsiveness which gave no thought to details or possibilities. But in some subtle fashion that searching glance from the passing stranger brought him up with a little mental jerk. For the first time he remembered that he was playing a lone hand, that the very nature of his business was likely to rouse the most desperate and unscrupulous opposition. Considering the value of the stake and the penalties involved, the present occupant of the Shoe-Bar was likely to use every means in her power to prevent his accusations from becoming public. If the fellow who had just passed really was Tex Lynch, Buck had a strong intuition that he was the sort of a man who could be counted on to take a prominent hand in the game, and also that he wouldn't be any too particular as to how he played it. A mile beyond the draw the trail forked, and Stratton took the left-hand branch. The grazing hereabouts was poor, and at this time of year particularly the Shoe-Bar cattle were more likely to be confined to the richer fenced-in pastures belonging to the ranch. The scenery thus presenting no points of interest, Buck's thoughts turned to the interview ahead of him. Marshaling his facts, he planned briefly how he would make use of them, and finally began to draw scrappy mental pen-pictures of the usurping Mary Thorne.