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1804: Nicholas Biddle, Original Journals of the Lewis and Clark Expeditions, 1804-1806, vol. I, ed. by Reuben Gold Thwaites (New York: Dodd, Mead & Co., 1904), 239; Donald Jackson, ed., Letters of the Lewis and Clark Expedition with Related Documents, 1783-1854 (University of Illinois Press, 1962), 531.