The Nez Perces, the Flatheads, and the Hanging-ears pride themselves upon the number of their horses, of which they possess more in proportion than any other of the mountain tribes within the buffalo range. Many of the Indian warriors and hunters encamped around Captain Bonneville possess from thirty to forty horses each. Their horses are stout, well-built ponies, of great wind, and capable of enduring the severest hardship and fatigue. The swiftest of them, however, are those obtained from the whites while sufficiently young to become acclimated and inured to the rough service of the mountains.
By degrees the populousness of this encampment began to produce its inconveniences. The immense droves of horses owned by the Indians consumed the herbage of the surrounding hills; while to drive them to any distant pasturage, in a neighborhood abounding with lurking and deadly enemies, would be to endanger the loss both of man and beast. Game, too, began to grow scarce. It was soon hunted and frightened out of the vicinity, and though the Indians made a wide circuit through the mountains in the hope of driving the buffalo toward the cantonment, their expedition was unsuccessful. It was plain that so large a party could not subsist themselves there, nor in any one place throughout the winter. Captain Bonneville, therefore, altered his whole arrangements. He detached fifty men toward the south to winter upon Snake River, and to trap about its waters in the spring, with orders to rejoin him in the month of July at Horse Creek, in Green River Valley, which he had fixed upon as the general rendezvous of his company for the ensuing year.
Of all his late party, he now retained with him merely a small number of free trappers, with whom he intended to sojourn among the Nez Perces and Flatheads, and adopt the Indian mode of moving with the game and grass. Those bands, in effect, shortly afterward broke up their encampments and set off for a less beaten neighborhood. Captain Bonneville remained behind for a few days, that he might secretly prepare caches, in which to deposit everything not required for current use. Thus lightened of all superfluous encumbrance, he set off on the 20th of November to rejoin his Indian allies. He found them encamped in a secluded part of the country, at the head of a small stream. Considering themselves out of all danger in this sequestered spot from their old enemies, the Blackfeet, their encampment manifested the most negligent security. Their lodges were scattered in every direction, and their horses covered every hill for a great distance round, grazing upon the upland bunch grass which grew in great abundance, and though dry, retained its nutritious properties instead of losing them like other grasses in the autumn.
When the Nez Perces, Flatheads, and Pends Oreilles are encamped in a dangerous neighborhood, says Captain Bonneville, the greatest care is taken of their horses, those prime articles of Indian wealth, and objects of Indian depredation. Each warrior has his horse tied by one foot at night to a stake planted before his lodge. Here they remain until broad daylight; by that time the young men of the camp are already ranging over the surrounding hills. Each family then drives its horses to some eligible spot, where they are left to graze unattended. A young Indian repairs occasionally to the pasture to give them water, and to see that all is well. So accustomed are the horses to this management, that they keep together in the pasture where they have been left. As the sun sinks behind the hills, they may be seen moving from all points toward the camp, where they surrender themselves to be tied up for the night. Even in situations of danger, the Indians rarely set guards over their camp at night, intrusting that office entirely to their vigilant and well-trained dogs.
In an encampment, however, of such fancied security as that in which Captain Bonneville found his Indian friends, much of these precautions with respect to their horses are omitted. They merely drive them, at nightfall, to some sequestered little dell, and leave them there, at perfect liberty, until the morning.
One object of Captain Bonneville in wintering among these Indians was to procure a supply of horses against the spring. They were, however, extremely unwilling to part with any, and it was with great difficulty that he purchased, at the rate of twenty dollars each, a few for the use of some of his free trappers who were on foot and dependent on him for their equipment.
In this encampment Captain Bonneville remained from the 21st of November to the 9th of December. During this period the thermometer ranged from thirteen to forty-two degrees. There were occasional falls of snow; but it generally melted away almost immediately, and the tender blades of new grass began to shoot up among the old. On the 7th of December, however, the thermometer fell to seven degrees.
The reader will recollect that, on distributing his forces when in Green River Valley, Captain Bonneville had detached a party, headed by a leader of the name of Matthieu, with all the weak and disabled horses, to sojourn about Bear River, meet the Shoshonie bands, and afterward to rejoin him at his winter camp on Salmon River.
More than sufficient time had elapsed, yet Matthieu failed to make his appearance, and uneasiness began to be felt on his account. Captain Bonneville sent out four men, to range the country through which he would have to pass, and endeavor to get some information concerning him; for his route lay across the great Snake River plain, which spreads itself out like an Arabian desert, and on which a cavalcade could be descried at a great distance. The scouts soon returned, having proceeded no further than the edge of the plain, pretending that their horses were lame; but it was evident they had feared to venture, with so small a force, into these exposed and dangerous regions.
A disease, which Captain Bonneville supposed to be pneumonia, now appeared among the Indians, carrying off numbers of them after an illness of three or four days. The worthy captain acted as physician, prescribing profuse sweatings and copious bleedings, and uniformly with success, if the patient were subsequently treated with proper care. In extraordinary cases, the poor savages called in the aid of their own doctors or conjurors, who officiated with great noise and mummery, but with little benefit. Those who died during this epidemic were buried in graves, after the manner of the whites, but without any regard to the direction of the head. It is a fact worthy of notice that, while this malady made such ravages among the natives, not a single white man had the slightest symptom of it.