Capt. Lewis took a Vocabelary of the Language of those people who call themselves So kulk,

The Houses or Lodges of the tribes of the main Columbia river is of large Mats made of rushes,
William Clark

This river is remarkably Clear and Crouded with Salmon in maney places, I observe in assending great numbers of Salmon dead on the Shores, floating on the water and in the Bottoms which can be seen at the debth of 20 feet. the Cause of the emence numbers of dead Salmon I can't account for So it is I must have seen 3 or 400 dead and maney living
William Clark

The water in Columbia River (or North fork) is much smoother & the current more gentle here than the Ki-o-me-num or Lewis's River.
-Patrick Gass-

the women...ware long leather Shirts which highly ornimented with beeds Shells &c. &c. Those people appeare of a mild disposition and friendly disposed-
-Captain Clark-

I killed a Fowl of the pheasant kind as large as a Small turkey.
-William Clark-