the last eight or ten miles, stopped at about three quarters of a mile
from the entrance of the Platte. Captains Lewis and Clarke ascended the
river in a periogue, for about one mile, and found the current very
rapid; rolling over sands, and divided into a number of channels; none
of which are deeper than five or six feet. One of our Frenchmen, who
spent two winters on it, says that it spreads much more at some distance
from the mouth; that its depth is generally not more than five or six
feet; that there are many small islands scattered through it, and that
from its rapidity and the quantity of its sand, it cannot be navigated
by boats or periogues, though the Indians pass it in small flat canoes
made of hides. That the Saline or Salt river, which in some seasons is
too brackish to be drank, falls into it from the south about thirty
miles up, and a little above it Elkhorn river from the north, running
nearly parallel with the Missouri. The river is, in fact, much more
rapid than the Missouri, the bed of which it fills with moving sands,
and drives the current on the northern shore, on which it is constantly
encroaching. At its junction the Platte is about six hundred yards wide,
and the same number of miles from the Mississippi. With much difficulty
we worked round the sandbars near the mouth, and came to above the
point, having made fifteen miles. A number of wolves were seen and heard
around us in the evening.

July 22. The next morning we set sail, and having found at the distance
of ten miles from the Platte, a high and shaded situation on the north,
we encamped there, intending to make the requisite observations, and to
send for the neighbouring tribes, for the purpose of making known the
recent change in the government, and the wish of the United States to
cultivate their friendship.