[12]Homer C. Hockett, Political and Social Growth of the United States 1492-1852 (New York: Macmillan Co., 1933), p. 368.
[13]Ibid., p. 369.
[14]Ibid., p. 371.
[15]Fridtjof Nansen, “The Norsemen in America,” The Geographical Journal, XXXVIII, 6 (Dec. 1911), 558.
[16]Reuben G. Thwaites, Original Journals of the Lewis and Clark Expedition 1804-1806 (New York: Dodd Mead and Co., 1905), p. 262. Clark reached Yellowstone River on July 15, 1806.
[17]Francis Antoine Larocque, Journal (Sources of Northwest History No. 20, University of Montana), p. 20. Dee Linford says the name Yellowstone was used by David Thompson in 1798, but that Americans did not learn about the river until about 1805. See “Wyoming Stream Names,” Annals of Wyoming, XV, 3 (July, 1943), 269.
[18]Patrick Gass, Journal (Chicago: A. C. McClurg, 1904), p. 253. In 1832 a steamboat named the “Yellowstone” arrived at Fort Union.
[19]P. Koch, “Discovery of Yellowstone National Park,” Magazine of American History, II (June, 1884), 498.
[20]Just how far Coronado penetrated the Rockies is a disputed point. It is certain that Verendrye reached Pierre, South Dakota. Some contend that he came as far as the Little Bighorn River. It is probable that some of Henry’s men were free trappers, which accounts for the fact that they split in groups when the fort was abandoned.
[21]Others to participate in this discovery were Milton Mangum, Clifford Mangum, John T. Elliott, Budge Elliott, William Thornock, and David Beal.