William Clark, History of the Expedition under the Command of Captains Lewis and Clark…
“ Along this wide level country the Missouri pursued its winding course, filled with water to its even and grassy banks, while about four miles above it was joined by a large river flowing from the northwest through a valley three miles in width, and distinguished by the timber which adorned its shores; the Missouri itself stretches to the south in one unruffled stream of water as if unconscious of the roughness it must soon encounter, and bearing on its bosom vast flocks of geese, while numerous herds of buffaloe are feeding on the plains which surround it. ”
