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Exploration and discovery

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General Report -- Plate I. Lassens Butte from Vicinty of Camp 18.
General Report -- Plate I. Lassens Butte from Vicinty of Camp 18.

Reduced Map of the Territory West of the Rocky Mountians by Capt. B.L.E. Bonneville U.S.A
Reduced Map of the Territory West of the Rocky Mountians by Capt. B.L.E. Bonneville U.S.A

Porcupine Terraces. Uintah Mountains in the Distance
Porcupine Terraces. Uintah Mountains in the Distance

Round Prairie from the haed of the sam. April 21st at 10 AM Timpanogos River entering round prairie. Timpanogos cañon.
Round Prairie from the haed of the sam. April 21st at 10 AM Timpanogos River entering round prairie. Timpanogos cañon.

Humboldt Pass May 22d at 12 A. M. from high peak east of pass. SA. 69° W. Mg. Franklin River. Distant snowy divide of the Humboldt and Columbia Rivers. Humboldt Valley 40 Miles Wide West of Pass.
Humboldt Pass May 22d at 12 A. M. from high peak east of pass. SA. 69° W. Mg. Franklin River. Distant snowy divide of the Humboldt and Columbia Rivers. Humboldt Valley 40 Miles Wide West of Pass.

Mt. Baker & Cascade Range from Whitbys Island
Mt. Baker & Cascade Range from Whitbys Island

Mt. Rainer Viewed from Near Steilcoom
Mt. Rainer Viewed from Near Steilcoom

Crossing Hellgate River Jan 6th 1854
Crossing Hellgate River Jan 6th 1854

Source of the Peluse
Source of the Peluse

Enterance to the Root Mountains by the Lou Lou Fork
Enterance to the Root Mountains by the Lou Lou Fork