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Exploration and discovery

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Main Chain of the Rocky Mountains as seen from the East, - Extending from a Point North of the Marias Pass to Near the Little Blackfoot Pass
Main Chain of the Rocky Mountains as seen from the East, - Extending from a Point North of the Marias Pass to Near the Little Blackfoot Pass

Bear's Teeth Missouri River - Gate of the Mountains
Bear's Teeth Missouri River - Gate of the Mountains

Hot Spring Mound in the
Hot Spring Mound in the "Deer Lodge" Prairie of the Rocky Mountains

Big Hole Prairie from the North
Big Hole Prairie from the North

Grand Coulee
Grand Coulee

Kettle Falls, Columbia River
Kettle Falls, Columbia River

Cape Horn Columbia River
Cape Horn Columbia River

Cascades of the Columbia
Cascades of the Columbia

Fort Vancouver, W. T.
Fort Vancouver, W. T.

Dalles
Dalles