assemblage of birds as produced by some supernatural cause: among them
we observed the brown martin employed in looking for insects, and so
gentle that they did not fly until we got within a few feet of them. We
have also distinguished among numerous birds of the plain, the
blackbird, the wren or prairie bird, and a species of lark about the
size of a partridge, with a short tail. The excessive heat and thirst
forced us from the hill, about one o'clock, to the nearest water, which
we found in the creek, at three miles distance, and remained an hour and
a half. We then went down the creek, through a lowland about one mile in
width, and crossed it three times, to the spot where we first reached it
in the morning. Here we gathered some delicious plums, grapes and blue
currants, and afterwards arrived at the mouth of the river about sunset.
To this place the course from the mound is S. twenty miles, E. nine
miles; we there resumed our periogue, and on reaching our encampment of
last night set the prairies on fire, to warn the Sioux of our approach.
In the mean time, the boat under serjeant Pryor had proceeded in the
afternoon one mile, to a bluff of blue clay on the south, and after
passing a sandbar and two sand islands fixed their camp at the distance
of six miles on the south. In the evening some rain fell. We had killed
a duck and several birds: in the boat, they had caught some large
catfish.

Sunday, August 26. We rejoined the boat at nine o'clock before she set
out, and then passing by an island, and under a cliff on the south,
nearly two miles in extent and composed of white and blue earth,
encamped at nine miles distance, on a sandbar towards the north.
Opposite to this, on the south, is a small creek called Petit Arc or
Little Bow, and a short distance above it, an old village of the same
name. This village, of which nothing remains but the mound of earth
about four feet high surrounding it, was built by a Maha chief named