Meriwether Lewis (1774-1809) en William Clark (1770-1838) voerden van 1804-1806 een verkenningstocht uit in het zogeheten Louisiana Territory, van de Midwest tot aan de kust van de Grote Oceaan. Ze beschreven hun bevindingen nauwgezet in hun Journals.
[Lewis] Sunday August 25th 1805. [...] Capt. Clark set out early this morning and continued his rout to the indian camp at the entrance of fish Creek; here he halted about an hour; the indians gave himself and party some boiled salmon and burries [WC?: tho' not half Sufficient &c]. these people appeared extreemly hospitable tho' poor and dirty in the extreem. he still pursued the track up the river by which he had decended and in the evening arrived at the bluff on the river where he had encamped on the 21st Inst. it was late in the evening before he reached this place.  they formed their camp, and Capt. C. sent them in different directions to hunt and fish. some little time after they halted a party of Indians passed by on their way down the river, consisting of a man a woman and several boys; from these people the guide obtained 2 salmon which together with some small fish they caught and a beaver which Shannon killed furnished them with a plentifull supper. the pine grows pretty abundantly high up on the sides of the mountains on the opposite side of the river. one of the hunters saw a large herd of Elk on the opposite side of the river in the edge of the timbered land.— Winsor was taken very sick today and detained Capt C. very much on his march. three hunters whom he had sent on before him this morning joined him in the evening having killed nothing; they saw only one deer.
[Clark] Sunday August 25th 1805. Set out verry early and halted one hour at the Indian Camp, they were kind gave us all a little boiled Sammon & dried buries to eate, abt. half as much as I could eate, those people are kind with what they have but excessive pore & Durtey.— we proceeded on over the mountains we had before passed to the Bluff we Encamped at on the 21s instant where we arrived late and turned out to hunt & fish, Cought Several Small fish, a party of Squars & one man with Several boys going down to guathe berries below, my guide got two Sammon from this party [(]which made about half a Supper for the party), after Dark Shannon came in with a beaver which the Party suped on Sumptiously— one man verry Sick to day which detained us verry much I had three hunters out all day, they saw one Deer, killed nothing. one of the Party Saw 9 Elk on a Mountain to our right assending, amongst the Pine timber which is thick on that side