by three small islands, which occasioned the water to pass along four channels.  Of these three were narrow, and stopped by means of trees which were stretched across, and supported by willow stakes, sufficiently near each other to prevent the passage of the fish.  About the centre of each was placed a basket formed of willows, eighteen or twenty feet in length, of a cylindrical form, and terminating in a conic shape at its lower extremity; this was situated with its mouth upwards, opposite to an aperture in the weir.  The main channel of the water was then conducted to this weir, and as the fish entered it they were so entangled with each other that they could not move, and were taken out by untying the small end of the willow basket.  The weir in the main channel was formed in a manner somewhat different; there were in fact two distinct weirs formed of poles and willow sticks quite across the river, approaching each other obliquely with an aperture in each side near the angle.  This is made by tying a number of poles together at the top, in parcels of three, which were then set up in a triangular form at the base, two of the poles being in the range desired for the weir, and the third down the stream.  To these poles two ranges of other poles are next lashed horizontally, with willow bark and wythes, and willow sticks joined in with these crosswise, so as to form a kind of wicker-work from the bottom of the river to the height of three or four feet above the surface of the water.  This is so thick as to prevent the fish from passing, and even in some parts with the help of a little gravel and some stone enables them to give any direction which they wish to the water.  These two weirs being placed near to each other, one for the purpose of catching the fish as they ascend, the other as they go down the river, is provided with two baskets made in the form already described, and which are placed at the apertures of the weir.  After examining these curious objects, he returned to the lodges, and soon passed the river to the left, where an Indian brought him a tomahawk which he said he had found in the grass, near the lodge where captain Lewis had staid on his first visit to the village.  This was a tomahawk which had been missed at the time, and supposed to be stolen; it was however the only article which had been lost in our intercourse with the nation, and as even that was returned the inference is highly honourable to the integrity of the Shoshonees.  On leaving the lodges captain Clarke crossed to the left side of the river, and despatched five men to the forks of it, in search of the man left behind yesterday, who procured a horse and passed by another road as they learnt, to the forks.  At the distance of fourteen miles they killed a very large salmon, two and a half feet long, in a creek six miles below the forks:  and after travelling about twenty miles through the valley, following the course of the river, which runs nearly northwest, halted in a small meadow