The Colour of the Water differs from that of the Missouri it being of a yellowish brown, whilst that of the Missouri is of a deep drab Colour containing a greater portion of mud than the Rochejhone. This delighfull river from indian information has it's extreem sources with the North river in the Rocky mountains on the confines of New Mexico. it also most probably has it's westerly sources connected with the Multnomah and those the main Southerly branch of Lewis's river while it's Easterly branches head with those of Clark's R. the bighorn and River Platte and may be said to water the middle portion of the Rocky Mountains from N W to S. E. for several hundred miles. the indians inform us, that a good road passes up this river to it's extreem source from whence it is buta short distance to the Spanish settlements. there is also a considerable fall on this river within the mountains but at what distance from it's source we never could learn like all other branches of the Missouri which penetrate the Rocky Mountains all that portion of it lying within those mountains abound in fine beaver and Otter, it's streams also which issuing from the rocky mountain and discharging themselves above Clark's fork inclusive also furnish an abundance of beaver and Otter and possess considerable portions of small timber in their values. to an establishment on this river at clarks Fork the Shoshones both within and West of the Rocky Mountains would willingly resort for the purposes of trade as they would in a great measure be relived from the fear of being attacked by their enimies the blackfoot Indians and Minnetares of fort de Prarie, which would most probably happen were they to visit any establishment which could be conveniently formed on the Missouri. I have no doubt but the same regard to personal safety would also induce many numerous nations inhabiting the Columbia and Lewis's river West of the mountains to visit this establishment in preference to that at the entrance of Maria's river, particularly during the first years of those Western establishments. the Crow Indians, Paunch Indians Castahanah's and others East of the mountains and south of this place would also visit this establishment; it may therefore be looked to as one of the most important establishments of the western fur trade. at the entrance of Clark's fork there is a sufficiency of timber to support an establishment, an advantage that no position possesses from thence to the Rocky Mountains. The banks of the yellowstone river a bold not very high yet are not subject to be overflown, except for a few miles immediately below where the river issues from the mountain. the bed of this river is almost entirely composed of loose pebble, nor is it's bed interrupted by chains of rock except in one place and that even furnishes no considerable obstruction to it's navigation. as you decend with the river from the mountain the pebble becomes smaller and the quantity of mud increased untill you reah Tongue river where the pebble ceases and the sand then increases and predominates near it's mouth. This river can be navigated to greater advantage in perogues than any other craft yet it possesses suficient debth of water for battauxs even to the mountains; nor is there any of those moving sand bars so formidable to the navigation of many parts of the Missouri. The Bighorn R and Clark's fork may be navigated a considerable distance in perogues and canoes. Tongue river is also navigable for canoes a considerable distance.
[Clark, August 4, 1806]
Wednesday 4th August 1806 Musquetors excessively troublesom So much So that the men complained that they could not work at their Skins for those troublesom insects. and I find it entirely impossible to hunt in the bottoms, those insects being So noumerous and tormenting as to render it imposseable for a man to continue in the timbered lands and our best retreat from those insects is on the Sand bars in the river and even those Situations are only clear of them when the Wind Should happen to blow which it did to day for a fiew hours in the middle of the day. the evenings nights and mornings they are almost indureable perticelarly by the party with me who have no Bears to keep them off at night, and nothing to Screen them but their blankets which are worn and have maney holes. The torments of those Missquetors and the want of a Sufficety of Buffalow meat to dry, those animals not to be found in this neighbourhood induce me to deturmine to proceed on to a more eliagiable Spot on the Missouri below at which place the Musquetors will be less troublesom and Buffalow more plenty. (I will here obseve that Elk is Abundant but their flesh & fat is hard to dry in the Sun, and when dry is much easirSpoiled than either the Buffalow or Deer) I ordered the Canoes to be reloaded with our baggage & dryed meat which had been Saved on the Rochejhone together with the Elk killed at this place. wrote a note to Capt Lewis informing him of my intentions and tied it to a pole which I had Stuck up in the point. At 5 P. M Set out and proceeded on down to the 2d point which appeared to be an eligable Situation for my purpose killed a porcupine on this point the Musquetors were So abundant that we were tormented much worst than at the point. The Child of Shabono has been So much bitten by the Musquetor that his face is much puffed up & Swelled. I encamped on this extensive Sand bar which is on the N W. Side.
[Clark, August 5, 1806]
Thursday 5th August 1806. The Musquetors was So troublesom to the men last night that they Slept but very little. indeed they were excessive troublesom to me. my Musquetor Bear has a number of Small holes worn through they pass in. I Set out at an early hour intending to proceed to Some other Situation. I had not proceded on far before I Saw a ram of the big horn Animal near the top of a Lard. Bluff I assended the hill with a view to kill the ram. the Misquetors was So noumerous that I could not keep them off my gun long enough to take Sight and by thair means missed. at 10 a.m. the wind rose with a gentle breeze from the N. W. which in Some measure thinned the Misquetors. I landed on a Sand bar from the South Point intending to form a Camp at this place and Continue untill Capt Lewis Should arive. and killed two Buck Elks and a Deer the best of their flesh & fat I had Saved. had all the dryed meat & fat put out to Sun and continued at this place untill late in the evening finding that there were no buffalow or fresh Sign I deturmined to proceed on accordingly Set out at 4 P. M and proceeded on but a fiew miles eeir I saw a Bear of the white Species walking on a Sand bear. I with one man went on the Sand bear and killed the Bear which proved to be a feemale very large and fat. much the fattest animale we have killed on the rout as this bear had got into the river before we killed her I had her toed across to the South Side under a high Bluff where formed a Camp, had the bear Skined and fleaced. our Situation was exposed to a light breeze of wind which continued all the forepart of the night from the S W. and blew away the misquetors.
[Clark, August 6, 1806]
Friday 6th August 1806 I rose very wet. about 11 P M last night the wind become very hard for a fiew minits Suckceeded by Sharp lightning and hard Claps of Thunder and rained for about 2 hours very hard after which it continued Cloudy the balance of the night. as we were about Setting out a female Big horn animal came on the bluff imediately above us and looked down. I derected Labeech to Shoot it which he did, after Skinning this animal we Set out and proceeded on to a Sand bar on the S W. Side below the enterance of White earth river where I landed and had the meat Skins and bedding all put out to dry. wind hard from the N W. I halted on the N W. Side of this river in the bend above the white earth river, where I saw where the Indians had been digging a root which they eate and use in Seup, not more than 7 or 8 days past. This morning a very large Bear of white Specis, discovered us floating in the water and takeing us, as I prosume to be Buffalow imediately plunged into the river and prosued us. I directed the men to be Still. this animal Came within about 40 yards of us, and tacked about. we all fired into him without killing him, and the wind So high that we could not pursue him, by which means he made his escape to the Shore badly wounded. I have observed buffalow floating down which I suppose must have been drounded in Crossing above. more or less of those animals drown or mire in passing this river. I observed Several floating buffalow on the R. Rochejhone imediately below where large gangues had Crossed. The wind blew hard all the after part of the day. I derected the men to dress their Skins except one which I took with me and walkd. through the bottom to the foot of the hills I killed five deer and the man with me killed 2. four others were killed in the Course of the day by the party only 2 of those deer were fat owing as I suppose to the Musquetors which are So noumerous and troublesom to them that they Cannot feed except under the torments of millions of those Musquetors.