"Say," he said, when Katz came lumbering into the edge of the illumination, "the boy isn't there, but I've got good news for you, just the same. The man who went in with my chum is one of the train robbers the cowboys are in search of. There's ten thousand dollars reward offered for him, and all you've got to do is to walk in there, hold a gun to his head, and march him off to Green River. You ought to give me half the reward, though," the boy added, "for you wouldn't have caught him only for me."