Note 41 — Chapter XVIII · VOYAGE FROM MUSCLESHELL RIVER TO FORT MC KENZIE, FROM JULY 28TH TO AUGUST 9TH

See Plate 68, figure 20, in the accompanying atlas, our volume xxv. Bighorn Island is not specifically mentioned in the text of the Original Journals, but it was passed on the day (May 25, 1805) when Drouillard first brought one of these animals to camp. See Original Journals, ii, pp. 71-76, with small drawing. In Clark's "Summary Statement of Rivers, etc.," it is named Ibex Island; op. cit., vi, p. 61.—Ed.