Lewis and Clark Trail Maps VI: Missouri River Between Camp River DuBois (Illinois) and Fort Mandan (North Dakota)-Outbound 1804; Return 1806

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By using measurements and notes in William Clark's journals, Plamondon has created maps depicting the Corps of Discovery's route on the Missouri River from Illinois to North Dakota in 1804. The maps compare the modern beds of streams to their courses at the time of exploration. Of further interest are excerpts from the expedition diaries and an insightful essay on frontier surveying.

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