Both men stood silent as they watched the herd. Although the animals were two miles distant, as has been said, in the clear air they seemed to be much nearer, and the entire herd was advancing in a body. Out from the ravine was coming a steadily increasing number of buffaloes. Soon the great herd, forming as if some one had been giving directions which they understood, began to move in such a manner that for a moment it appeared as if the prowling wolves would be surrounded. In a brief time, however, the savage animals were aware of the threatening danger, and with incredible speed fled from the region. The advancing buffaloes, however, did not halt when they saw their enemies disperse. Their speed steadily increased. The earth rumbled beneath the heavy tread of the myriad feet, producing a sound not unlike that of distant thunder. An exclamation of dismay or fear from Jean caused Reuben to glance hastily at his companion; and it was plain that Jean was anxious or alarmed. Not many minutes elapsed, however, before Reuben understood the source of his friend’s excitement and was sharing in his feeling of fear. The great herd, moving now as if it was controlled by one motive, with steadily increasing speed was directly approaching the very place which the trappers had selected for their camping-place. CHAPTER II—IN PURSUIT OF A HERD “Queek! Queek!” called Jean. “At once! Immediately!” Whether or not it was the call of his excited companion that influenced Reuben, his pony was quickly bridled, and almost at the same time both men leaped upon the backs of their horses. In spite of the weariness of both men and beasts, in a brief time all were alike highly excited. The great rumbling mass was steadily approaching and the horses also were aware of the peril that threatened. In Reuben’s heart there was a thought that if he and his companion should fire at the buffaloes the course of the mighty herd might be diverted. Perhaps even the direction in which they were moving would be turned and they would then avoid the camp. The young trapper had heard many stories of men and horses that had been trampled beneath the feet of a frantic herd of buffaloes. As the huge animals came nearer and a mighty bull was seen acting as an advance guard, Reuben glanced quickly at Jean to see whether or not he shared in his alarm. Nothing apparently would be able to stand in the way of the rush of the oncoming horde. It was a sight unlike any that Reuben ever had seen. On, and still on, dashed the animals, moving almost as if the swaying mass was one huge creature. Neither Reuben nor Jean had as yet advanced from the camp, but both were waiting with loaded rifles, unable to discover just what the exact course of the fleeing herd was to be. “How many are there?” inquired Reuben in a low voice. “About seven hundred.”