Note 103 — LETTER I

Vermillion Post, established for trading with the lower Sioux tribes, was located on the east bank of the Missouri, ten miles below the mouth of the Vermillion. The shifting of the stream has since 1881 rendered difficult the locating of the old post, which was described by Audubon, who passed there in 1843; see M. R. Audubon, Audubon and his Journals (New York, 1897), i, pp. 493, 494. Also consult South Dakota Historical Collections, i, pp. 376, 377. Dickson's post, also called Fort Vermillion, was some miles above the river of that name. See our volume xxiv, p. 97, note 73. It is uncertain which post is intended.—Ed.