Monday, October 8. We proceeded early with a cool northwest wind, and at two and a half miles above Grouse island, reached the mouth of a creek on the south, then a small willow island, which divides the current equally; and at four and a half miles came to a river on the southern side where we halted. This river, which our meridian altitude fixes at 45 degrees 39’ 5” north latitude, is called by the Ricaras Wetawhoo; it rises in the Black mountains, and its bed which flows at the mouth over a low soft slate stone, is one hundred and twenty yards wide, but the water is now confined within twenty yards, and is not very rapid, discharging mud with a small proportion of sand: here as in every bend of the river, we again observe the red berries resembling currants, which we mentioned before. Two miles above the Wetawhoo, and on the same side, is a small river called Maropa by the Indians; it is twenty yards in width, but so dammed up by mud that the stream creeps through a channel of not more than an inch in diameter, and discharges no sand. One mile further we reached an island close to the southern shore, from which it is separated by a deep channel of sixty yards. About half way a number of Ricara Indians came out to see us. We stopped and took a Frenchman on board, who accompanied us past the island to our camp on the north side of the river, which is at the distance of twelve miles from that of yesterday. Captain Lewis then returned with four of the party to see the village; it is situated in the centre of the island, near the southern shore, under the foot of some high, bald, uneven hills, and contains about sixty lodges. The island itself is three miles long, and covered with fields in which the Indians raise corn, beans, and potatoes. Several Frenchmen living among these Indians as interpreters, or traders, came back with captain Lewis, and particularly a Mr. Gravelines, a man who has acquired the language. On setting out we had a low prairie covered with timber on the north, and on the south highlands, but at the mouth of the Wetawhoo the southern country changes, and a low timbered plain extends along the south, while the north has a ridge of barren hills during the rest of the day’s course.