Manuscripts
The Kolb brothers at salvage operations in the boat rock-locked in Dark Canyon Rapids. USGS Cataract Canyon survey under W. R. Chenoweth. Copy of small print loaned by Chenoweth
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Ellsworth Kolb - Log of 1921 USGS Cataract Canyon
Manuscripts
Professional and personal papers of Otis R. Marston and his collection of the materials on the history of Colorado River and Green River regions.
mssMarston papers

Emery Kolb "cooning" out to the trapped boat at Dark Canyon. USGS party under Chenoweth. Tasker is at left and Lint is center. Photo from Lint album
Manuscripts
mssMarston papers V017/0082



