Henri obeyed, and in a few seconds the three friends crossed the brook to the Indian camp, and were guided to the principal lodge by Pee-eye-em. Here a great council was held, and the proposed attempt at negotiations for peace with their ancient enemies fully discussed. While they were thus engaged, and just as Pee-eye-em had, in the energy of an enthusiastic peroration burst the blue surtout almost up to the collar, a distant rushing sound was heard, which caused every man to spring to his feet, run out of the tent, and seize his weapons.

“What can it be, Joe?” whispered Dick, as they stood at the tent door leaning on their rifles, and listening intently.

“Dunno,” answered Joe shortly.

Most of the numerous fires of the camp had gone out, but the bright moon revealed the dusky forms of thousands of Indians, whom the unwonted sound had startled, moving rapidly about.

The mystery was soon explained. The Indian camp was pitched on an open plain of several miles in extent, which took a sudden bend half a mile distant, where a spur of the mountains shut out the further end of the valley from view. From beyond this point the dull rumbling sound proceeded. Suddenly there was a roar as if a mighty cataract had been let loose upon the scene. At the same moment a countless herd of wild horses came thundering round the base of the mountain and swept over the plain straight towards the Indian camp.

“A stampedo!” cried Joe, springing to the assistance of Pee-eye-em, whose favourite horses were picketted near the tent.

On they came like a living torrent, and the thunder of a thousand hoofs was soon mingled with the howling of hundreds of dogs in the camp, and the yelling of Indians, as they vainly endeavoured to restrain the rising excitement of their steeds. Henri and Dick stood rooted to the ground, gazing in silent wonder at the fierce and uncontrollable gallop of the thousands of panic-stricken horses that bore down upon the camp with the tumultuous violence of a mighty cataract.

As the maddened troop drew nigh, the camp horses began to snort and tremble violently, and when the rush of the wild steeds was almost upon them, they became ungovernable with terror, broke their halters and hobbles, and dashed wildly about. To add to the confusion at that moment, a cloud passed over the moon and threw the whole scene into deep obscurity. Blind with terror, which was probably increased by the din of their own mad flight, the galloping troop came on, and, with a sound like the continuous roar of thunder that for an instant drowned the yell of dog and man, they burst upon the camp, trampling over packs and skins, and dried meat, etcetera, in their headlong speed, and overturning several of the smaller tents. In another moment they swept out upon the plain beyond, and were soon lost in the darkness of the night, while the yelping of dogs, as they vainly pursued them, mingled and gradually died away with the distant thunder of their retreat.

This was a “stampedo,” one of the most extraordinary scenes that can be witnessed in the western wilderness.

“Lend a hand, Henri,” shouted Joe, who was struggling with a powerful horse. “Wot’s comed over yer brains, man? This brute ’ll git off if ye don’t look sharp.”