A dull red spot glowed in each of Dave's tanned cheeks. With a quick intaking of his breath he lightly touched the spurs to his horse--lightly, for that was all the intelligent beast needed. Dave passed his taunting enemy on the rush, and planting himself directly in front of him on the trail, drew rein so sharply that his steed reared. The cows, scattered by the sudden rush, ambled awkwardly on a little distance, and then stopped to graze. "What do you mean by getting in my way?" growled Len. "I mean to have you stop and answer a few questions," was the calm retort. "If it's about these cattle I tell you I'm not trying to drive off any of yours," said Len, in whining tones. He knew the severe penalty attached to this in a cow country, and Dave was sufficiently formidable, as he sat easily on his horse facing the bully, to make Len a little more respectful. "I'm not going to ask you about these cattle--at least not right away," Dave went on. "This is about another matter. You said something just now that needs explaining." "I say a good many things," Len admitted, and again there sounded in his voice a sneer. "I don't have to explain to you everything I say; do I?" "You do when it concerns me," and Dave put his horse directly across the trail, which, at this point narrowed and ran between two low ranges of hills. "You said something about me just now--you called me a nameless, picked-up nobody!" Dave could not help wincing as he repeated the slur. "Well, what if I did?" demanded the bully. "I want to know what you mean. You insinuated that Mr. Carson was not my father." "He isn't!" "Why do you say that, and how do you know?" Dave asked. In spite of his dislike of Len, and the knowledge that the bully was not noted for truth-telling, Dave could not repress a cold chill of fear that seemed to clutch his heart. "I say that because it's so, and how I know it is none of your affair," retorted Len. "Oh yes, it is my affair, too!" Dave exclaimed. He was fast regaining control of himself. "It is very much my affair. I demand an explanation. How do you know Mr. Carson isn't my father?" "Well, I know all right. He picked you up somewhere. He doesn't know what your name is himself. He just let you use his, and he called you Dave. You're a nobody I tell you!" Dave spurred his horse until it was close beside that of Len's. Then leaning over in the saddle, until his face was very near to that of the bully's, and with blazing eyes looking directly into the shrinking ones of the other rancher's son, Dave said slowly, but with great emphasis: "Who--told--you?" There was menace in his tone and attitude, and Len shrank back. "Oh, don't be afraid!" Dave laughed mirthlessly. "I'm not going to strike you--not now." "You--you'd better not," Len muttered. "I want you first to answer my questions," Dave went on. "After that I'll see what happens. It's according to how much truth there is in what you have said."