Portrait of William Clark by Charles Willson Peale, c. 1807–1809. [Courtesy of the Independence National Historical Park]
William Clark (1770–1838)

William Clark, the celebrated explorer who joined Meriwether Lewis …

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Henry Rowe Schoolcraft. [Popular Science Monthly, May 1890]
Henry Rowe Schoolcraft (1793–1864)

Henry Rowe Schoolcraft has a deserved reputation as an accomplished scientist-explorer who…

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