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Front page, History of the Expedition Under the Command of Captains Lewis and Clark…, Philadelphia, PA, 1814.
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Front page of the Lewis and Clark expedition History of the Expedition Under the Command of Captains Lewis and Clark to the Sources of the Missouri
Thence Across the Rocky Mountains and now the River Columbia to the Pacific Ocean Performed During the Years 1804-5-6

Credit: Library of Congress

When finally published in 1814, the authorized History of the Expedition… did not include Thomas Jefferson's desired volume on natural history. Scientists would learn of Lewis and Clark's scientific discoveries in works published by others in the decades that followed.

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