Note 126 — LETTER II
Reading edition
De Smet had accompanied the Indians in their journey from Pierre's Hole westward and then northward along the Teton River to its junction with the Henry; thence they proceeded up that stream to its source in Henry Lake, the northeastern corner of Idaho. As the source of a chief fork of the Snake, this is one of the mountain origins of the Columbia. It was named for Andrew Henry, an adventurous trader, for whom see our volume xv, p. 246, note 107.—Ed.