"I don't think there's anyone in that crowd that will laugh, for they all had the same experience. I know Old Bronze and Short Stop have lost a herd more than once." "It won't do to stay here," remarked Avon, "for you know there is another herd only a mile off, and if the two become mixed, it will be a big job to cut out ours to-morrow." "I shouldn't wonder," replied Gleeson, "if the cattle have gone back to the bed-ground; at any rate we'll look for them there." The return to the wagon enabled the couple to obtain their bearings, and they knew the proper course to reach the spot, but the possibility of the theory being wrong caused them to separate, so as to proceed thither by routes which, while substantially parallel, were so far apart that they were out of each other's sight and hearing, the latter being chiefly due to the direction of the wind. Avon spurred Thunderbolt into an easy canter, the soft grass making the travel easy, though there was always the risk of his animal sinking one or more of his hoofs into a hole, with the prospect of a broken leg for the horse and a dislocated neck for his rider. When it seemed to the latter that he had passed the intervening distance, he drew his mustang to a walk, listening and peering through the gloom with all the power at his command. There was no lighting of the darkness, the wind still blew keenly, and the fine drizzling rain continued. No sight nor sound came to him, and, once more bringing his animal to a halt, he dismounted and pressed his ear to the ground. This time he caught a distinct noise: it was that made by the hoofs of a horse. He was walking, and was so near that Thunderbolt pricked his ears and uttered a faint whinny of salutation. Avon instantly rose to his feet, and remounted. Looking keenly into the wet darkness, he became aware that a horse was standing motionless but a short distance off on his left. In the gloom the outlines could be traced, but so dimly that he was uncertain whether he had a rider or not. The steed held his head well up like Thunderbolt, and appeared to be scrutinizing the youth and his animal with a curiosity equal to theirs. There was something so impressive in the sight of the statue-like object, which emitted not the slightest sound, that young Burnet hesitated whether to advance or to await its approach. The man could not be Gleeson, and, whoever he was, it was evident that he regarded Avon with inquiring suspicion. But unwilling to maintain the trying situation, the latter touched the neck of his mustang in a way which the animal recognized as a command to move forward very slowly. He obeyed, and had advanced but a few short steps when Avon to his astonishment perceived that the strange horse was without a rider. "I don't understand that," mused the mystified young man, stopping his own animal, with several yards separating them; "he must have an owner, and what can have become of him, and why is----"