"On the hills we observed considerable quantities of dwarf juniper, which seldom grows higher than three feet. We killed in the course of the day an elk, three geese, and a beaver. The beaver on this part of the Missouri are in greater quantities, larger and fatter, and their fur is more abundant and of a darker color, than any we have hitherto seen.
Their favorite food seems to be the bark of the cottonwood and willow, as we have seen no other species of tree that has been touched by them, and these they gnaw to the ground through a diameter of twenty inches."
And on the twenty-first of April the journal says:
"Last night there was a hard white frost, and this morning the weather was cold, but clear and pleasant; in the course of the day, however, it became cloudy and the wind rose.
The country is of the same description as within the few last days.
We saw immense quantities of buffalo, elk, deer, antelopes, geese, and some swans and ducks, out of which we procured three deer and four buffalo calves, which last are equal in flavor to the most delicious veal; also two beaver and an otter."
As the party advanced to the westward, following the crooked course of the Missouri, they were very much afflicted with inflamed eyes, occasioned by the fine, alkaline dust that blew so lightly that it sometimes floated for miles, like clouds of smoke.
The dust even penetrated the works of one of their watches, although it was protected by tight, double cases.
In these later days, even the double windows of the railway trains do not keep out this penetrating dust, which makes one's skin dry and rough.
On the twenty-fifth of April, the explorers believed, by the signs which they observed, that they must be near the great unknown river of which they had dimly heard as rising in the rocky passes of the Great Divide and emptying into the Missouri. Captain Lewis accordingly left the party, with four men, and struck off across the country in search of the stream.
Under the next day's date the journal reports the return of Captain Lewis and says:--"On leaving us yesterday he pursued his route along the foot of the hills, which be descended to the distance of eight miles; from these the wide plains watered by the Missouri and the Yellowstone spread themselves before the eye, occasionally varied with the wood of the banks, enlivened by the irregular windings of the two rivers, and animated by vast herds of buffalo, deer, elk, and antelope.
The confluence of the two rivers was concealed by the wood, but the Yellowstone itself was only two miles distant, to the south.
He therefore descended the hills and camped on the bank of the river, having killed, as he crossed the plain, four buffaloes; the deer alone are shy and retire to the woods, but the elk, antelope, and buffalo suffered him to approach them without alarm, and often followed him quietly for some distance."
The famous water-course, first described by Lewis and Clark, was named by them the Yellow Stone River. Earlier than this, however, the French voyageurs had called the Upper Missouri the Riviere Jaune, or Yellow River; but it is certain that the stream, which rises in the Yellowstone National Park, was discovered and named by Lewis and Clark. One of the party, Private Joseph Fields, was the first white man who ever ascended the Yellowstone for any considerable distance.
Sent up the river by Captains Lewis and Clark, he travelled about eight miles, and observed the currents and sand-bars. Leaving the mouth of the river, the party went on their course along the Missouri. The journal, under date of April 27, says:--"From the point of junction a wood occupies the space between the two rivers, which at the distance of a mile come within two hundred and fifty yards of each other. There a beautiful low plain commences, widening as the rivers recede, and extends along each of them for several miles, rising about half a mile from the Missouri into a plain twelve feet higher than itself.
The low plain is a few inches above high water mark, and where it joins the higher plain there is a channel of sixty or seventy yards in width, through which a part of the Missouri, when at its greatest height, passes into the Yellowstone.
. . . . . . . . .
The northwest wind rose so high at eleven o'clock that we were obliged to stop till about four in the afternoon, when we proceeded till dusk.
On the south a beautiful plain separates the two rivers, till at about six miles there is a piece of low timbered ground, and a little above it bluffs, where the country rises gradually from the river: the situations on the north are more high and open.
We encamped on that side, the wind, the sand which it raised, and the rapidity of the current having prevented our advancing more than eight miles; during the latter part of the day the river became wider, and crowded with sand-bars. The game was in such plenty that we killed only what was necessary for our subsistence.
For several days past we have seen great numbers of buffalo lying dead along the shore, some of them partly devoured by the wolves.
They have either sunk through the ice during the winter, or been drowned in attempting to cross; or else, after crossing to some high bluff, have found themselves too much exhausted either to ascend or swim back again, and perished for want of food: in this situation we found several small parties of them.
There are geese, too, in abundance, and more bald eagles than we have hitherto observed; the nests of these last being always accompanied by those of two or three magpies, who are their inseparable attendants."