On leaving Dearborn's river we passed at three and a half miles a small creek, and at six beyond it an island on the north side of the river, which makes within that distance many small bends. At two and a half miles further is another island: three quarters of a mile beyond this is a small creek on the north side. At a mile and a half above the creek is a much larger stream thirty yards wide, and discharging itself with a bold current on the north side: the banks are low, and the bed formed of stones altogether. To this stream we gave the name of Ordway's creek, after serjeant John Ordway. At two miles beyond this the valley widens: we passed several bends of the river, and encamped in the centre of one on the south, having made twenty-one miles. Here we found a small grove of the narrow-leafed cottonwood, there being no longer any of the broad-leafed kind since we entered the mountains. The water of these rivulets which come down from the mountains is very cold, pure, and well tasted. Along their banks as well as on the Missouri the aspen is very common, but of a small kind. The river is somewhat wider than we found it yesterday; the hills more distant from the river and not so high; there are some pines on the mountains, but they are principally confined to the upper regions of them: the low grounds are still narrower and have little or no timber. The soil near the river is good, and produces a luxuriant growth of grass and weeds; among these productions the sunflower holds a very distinguished place. For several days past we have observed a species of flax in the low grounds, the leaf-stem and pericarp of which resemble those of the flax commonly cultivated in the United States: the stem rises to the height of two and a half or three feet, and spring to the number of eight or ten from the same root, with a strong thick bark apparently well calculated for use: the root seems to be perennial, and it is probable that the cutting of the stems may not at all injure it, for although the seeds are not yet ripe, there are young suckers shooting up from the root, whence we may infer that the stems which are fully grown and in the proper stage of vegetation to produce the best flax, are not essential to the preservation or support of the root, a circumstance which would render it a most valuable plant. To-day we have met with a second species of flax smaller than the first, as it seldom obtains a greater height than nine or twelve inches: the leaf and stem resemble those of the species just mentioned, except that the latter is rarely branched, and bears a single monopetalous bell-shaped blue flower, suspended with its limb downwards. We saw several herds of the big-horn, but they were in the cliffs beyond our reach. We killed an elk this morning and found part of a deer which had been left for us by captain Clarke. He pursued his route,

Friday, 19, early in the morning, and soon passed the remains of several Indian camps formed of willow brush, which seemed to have been deserted this spring. At the same time he observed that the pine trees had been stripped of their bark about the same season, which our Indian woman say her countrymen do in order to obtain the sap and the soft parts of the wood and bark for food. About eleven o'clock he met a herd of elk and killed two of them, but such was the want of wood in the neighbourhood that he was unable to procure enough to make a fire, and he was therefore obliged to substitute the dung of the buffaloe, with which he cooked his breakfast. They then resumed their course along an old Indian road. In the afternoon they reached a handsome valley watered by a large creek, both of which extend a considerable distance into the mountain: this they crossed, and during the evening travelled over a mountainous country covered with sharp fragments of flint-rock: these bruised and cut their feet very much, but were scarcely less troublesome than the prickly pear of the open plains, which have now become so abundant that it is impossible to avoid them, and the thorns are so strong that they pierce a double soal of dressed deer skin: the best resource against them is a soal of buffaloe hide in parchment. At night they reached the river much fatigued, having passed two mountains in the course of the day and having travelled thirty miles. Captain Clarke's first employment on lighting a fire was to extract from his feet the briars, which he found seventeen in number.

In the meantime we proceeded on very well, though the water appears to increase in rapidity as we advance: the current has indeed been strong during the day and obstructed by some rapids, which are not however much broken by rocks, and are perfectly safe: the river is deep, and its general width is from one hundred to one hundred and fifty yards wide. For more than thirteen miles we went along the numerous bends of the river and then reached two small islands; three and three quarter miles beyond which is a small creek in a bend to the left, above a small island on the right side of the river. We were regaled about ten o'clock P.M. with a thunder storm of rain and hail which lasted for an hour, but during the day in this confined valley, through which we are passing, the heat is almost insupportable; yet whenever we obtain a glimpse of the lofty tops of the mountains we are tantalized with a view of the snow. These mountains have their sides and summits partially varied with little copses of pine, cedar, and balsam fir. A mile and a half beyond this creek the rocks approach the river on both sides, forming a most sublime and extraordinary spectacle. For five and three quarter miles these rocks rise perpendicularly from the water's edge to the height of nearly twelve hundred feet. They are composed of a black granite near its base, but from its lighter colour above and from the fragments we suppose the upper part to be flint of a yellowish brown and cream colour. Nothing can be imagined more tremendous than the frowning darkness of these rocks, which project over the river and menace us with destruction. The river, of one hundred and fifty yards in width, seems to have forced its channel down this solid mass, but so reluctantly has it given way that during the whole distance the water is very deep even at the edges, and for the first three miles there is not a spot except one of a few yards, in which a man could stand between the water and the towering perpendicular of the mountain: the convulsion of the passage must have been terrible, since at its outlet there are vast columns of rock torn from the mountain which are strewed on both sides of the river, the trophies as it were of the victory. Several fine springs burst out from the chasms of the rock, and contribute to increase the river, which has now a strong current, but very fortunately we are able to overcome it with our oars, since it would be impossible to use either the cord or the pole. We were obliged to go on some time after dark, not being able to find a spot large enough to encamp on, but at length about two miles above a small inland in the middle of the river we met with a spot on the left side, where we procured plenty of lightwood and pitchpine. This extraordinary range of rocks we called the Gates of the Rocky mountains. We had made twenty-two miles; and four and a quarter miles from the entrance of the gates. The mountains are higher to-day than they were yesterday. We saw some big-horns, a few antelopes and beaver, but since entering the mountains have found no buffaloe: the otter are however in great plenty: the musquitoes have become less troublesome than they were.

Saturday 20. By employing the towrope whenever the banks permitted the use of it, the river being too deep for the pole, we were enabled to overcome the current which is still strong. At the distance of half a mile we came to a high rock in a bend to the left in the Gates. Here the perpendicular rocks cease, the hills retire from the river, and the vallies suddenly widen to a greater extent than they have been since we entered the mountains. At this place was some scattered timber, consisting of the narrow-leafed cottonwood, the aspen, and pine. There are also vast quantities of gooseberries, serviceberries, and several species of currant, among which is one of a black colour, the flavour of which is preferable to that of the yellow, and would be deemed superior to that of any currant in the United States. We here killed an elk which was a pleasant addition to our stock of food. At a mile from the Gates, a large creek comes down from the mountains and empties itself behind an island in the middle of a bend to the north. To this stream which is fifteen yards wide we gave the name of Potts's creek, after John Potts, one of our men. Up this valley about seven miles we discovered a great smoke, as if the whole country had been set on fire; but were at a loss to decide whether it had been done accidentally by captain Clarke's party, or by the Indians as a signal on their observing us. We afterwards learnt that this last was the fact; for they had heard a gun fired by one of captain Clarke's men, and believing that their enemies were approaching had fled into the mountains, first setting fire to the plains as a warning to their countrymen. We continued our course along several islands, and having made in the course of the day fifteen miles, encamped just above an island, at a spring on a high bank on the left side of the river. In the latter part of the evening we had passed through a low range of mountains, and the country became more open, though still unbroken and without timber, and the lowlands not very extensive: and just above our camp the river is again closed in by the mountains. We found on the banks an elk which captain Clarke had left us, with a note mentioning that he should pass the mountains just above us and wait our arrival at some convenient place. We saw but could not procure some redheaded ducks and sandhill cranes along the sides of the river, and a woodpecker about the size of the lark-woodpecker, which seems to be a distinct species: it is as black as a crow with a long tail, and flies like a jaybird. The whole country is so infested by the prickly pear that we could scarcely find room to lie down at our camp.

Captain Clarke on setting out this morning had gone through the valley about six miles to the right of the river. He soon fell into an old Indian road which he pursued till he reached the Missouri, at the distance of eighteen miles from his last encampment, just above the entrance of a large creek, which we afterwards called Whiteearth creek. Here he found his party so much cut and pierced with the sharp flint and the prickly pear that he proceeded only a small distance further, and then halted to wait for us. Along his track he had taken the precaution to strew signals, such as pieces of cloth, paper and linen, to prove to the Indians, if by accident they met his track, that we were white men. But he observed a smoke some distance ahead, and concluded that the whole country had now taken the alarm.