Note 24 — Chapter V · [1]

The first of these passes is now known as Maria’s, and is that taken by the Great Northern Railway in crossing from Missouri waters to those of the Columbia. The second pass is probably intended to designate that taken by Lewis and Clark, who used not one, but several passes through the network of mountains in western Montana and eastern Idaho. The third is the pass from Henry’s Lake to Red Rock, the source of the Jefferson (not of the Big Horn), over which De Smet went with the Indians—see his Letters in our volume xxvii, pp. 252, 253, notes 128, 130. The last is South Pass, for which see Wyeth’s Oregon in our volume xxi, p. 58, note 37.—Ed.