The other boy pushed back his sombrero. Jack Merrill was only a lad, after all, and he found himself suddenly called upon to answer a question which might have stumped a grown man. The question, however, was decided for him, and by a means so utterly unexpected that it came near jolting the Border Boys out of their composure; for Jack, as they had ridden up from the river, had admonished his companions to keep cool minds and wits and stiff upper lips whatever happened. They were going into a country in which, from what they had been able to gather, the insurrectos were numerically and strategically strong. Their only safety, the lad argued with a wisdom beyond his years, was in facing emergencies as they came, without betraying by outward signs whatever of inward perturbation they might feel. "I think we had better ride eastward, till we come to some village or town," Jack was beginning, in response to Walt's question, when a voice from behind suddenly hailed them in unmistakably American accents. "Ah, here you are, gentlemen. We've been expecting you." The boys wheeled to find that a horseman stood beside them. He had ridden almost noiselessly over the soft grass, which accounted for their not having heard his approach. Jack took in the new arrival's figure in a quick, comprehensive glance. The man who now faced them was a stalwart-looking chap of about thirty. His face was bronzed and his eyes keen. The face of one who has lived much out of doors. His manner seemed frank and open--even hearty--but any one skilled in reading faces would have noted in the rather receding chin and the eyes set close together that, in spite of his apparent heartiness, the newcomer was a man of limited reliability. The sort of chap, in short, who, while fearless up to a certain point and adventurous to a degree, would yet in an extremity look out for "Number One." As for his dress, it was much the same as the boys'. Sombrero, leather chaps well worn, blue shirt, and red neck handkerchief. Jack's keen eyes noted, too, that the pommel of his saddle bore some recent bullet scars, and that in two bearskin holsters reposed the formidable-looking butts of two heavy-caliber revolvers. The war-like note was further enhanced by the fact that across his saddle horn the new arrival carried a Remington rifle. The boys' position was now an extraordinary one. Advancing toward them down the road, was, what they could now perceive to be, a considerable body of horsemen. As if this were not enough to raise a question of whether it was better to fly or remain where they were, here was this total stranger, perhaps an American, too, hailing them as if he knew them, or, at least, had expected to meet them there. Jack's mind was made up in a flash, but, even in the brief instant he hesitated, the stranger's keen, close-set eyes narrowed suspiciously. "I'm not mistaken, am I? You expected to meet me here?"