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Clark made this diagram of the "Handsom Falls of the Missouri" during late June and early July, 1805.1
On the night of 17 June 1805, Clark, with Alexander Willard, John Colter, perhaps Joseph Field, and two others, camped at the mouth of a deep ravine below the south end of Crooked Falls. The next morning, continuing their systematic and detailed survey, the six men
Note that Crooked Falls are at "B" in Clark's map.
1. The original is in Voorhis #1, a codex in the Clark Family Collection, William Clark Papers, at the Missouri Historical Society, St. Louis. Photographic copy by David Schultz, 1997; NS 21278, copyright 1997.
2. Forty-two feet, according to the Pacific Railroad Survey of the early 1850s. Isaac I. Stevens, Narrative and Final Report of Explorations for a Route for a Pacific Railroad, near the Forty-Seventh and Forty-Ninth Parallels of North Latitude, from St. Paul to Puget Sound (Washington, D.C., 1855), 173.