After crossing the Bitterroot Range and canoeing down the cataract-filled Snake River, the Corps of Discovery finally reached the long-sought Columbia River in the autumn of 1805. Volume III continues the cartographic reconstruction of the explorers' trek as they set out from the Snake-Columbia junction, October 18, 1805, on the final leg of their journey to the sea. In addition to intricately mapping the Columbia's great rapids, desert and ra...
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