The river Koos-koos-kee being navigable in the place which the party had now reached, it remained only to build the requisite canoes. The wood was soon obtained; and such of the men as had sufficient strength for the undertaking, worked at the canoes, during the intervals of cool weather, and were not very long in completing them. In this part of the country the weather was cool during an easterly wind; exactly as, on the opposite side of the mountains, it had been in a westerly one. Their horses, to the number of thirty-eight, they consigned to the care of three Indian chiefs, to be kept till their return; and the saddles, with a small supply of ammunition, they buried in a hole, dug for the purpose, near the river. On the 8th of October, the travellers once more proceeded by water; and they now occupied five canoes. Exertion was still requisite, in the shoals and other difficult places; but the change was, on the whole, extremely favourable to them, and their progress down the current was proportionally rapid. This part of the country is inhabited by the _Shoshonees_, a tribe of _Snake Indians_, which, at present, consists of about a hundred warriors, and thrice as many women and children. Within their own recollection these Indians had lived in the plains; but they had been driven thence by the Pawkees and other powerful tribes, and they now live a wandering and precarious life. From the middle of May till the beginning of September they reside on the western waters; but, when the salmon, on which they chiefly subsist there, disappear, they cross the ridge and descend, slowly and cautiously, till they are joined, near the Three Forks, by other bands, either of their own nation, or of the Flat-heads, who make common cause with them. They then venture to hunt buffaloes in the plains eastward; but such is their dread of the Pawkees, that, so long as they can obtain the scantiest subsistence, they do not leave the interior of the mountains; and, as soon as they collect a large stock of dried meat, they again retreat: thus they alternately obtain food at the hazard of their lives, and hide themselves to consume it. Two-thirds of the year they are forced to live in the mountains, passing whole weeks with no other subsistence than a few fish and roots. The salmon were, at this time, fast retiring; roots were becoming scarce, they had not yet attained strength to hazard a meeting with their enemies, and nothing could be imagined more wretched than their condition.