Manuscripts
Prospect Canyon and Colorado River from above Vulcans Throne
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Vulcans Throne from Prospect Valley on the south side of the river
Manuscripts
mssMarston papers V083/0101
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Colorado River: miles 175-179 below Lee's Ferry; Toroweap; Vulcan's Throne; Prospect 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

Prospect Valley. Vulcans Throne and Toroweap Valley in distance
Manuscripts
mssMarston papers V083/0103

View up Toroweap Valley; Vulcans Throne at the edge of the Canyon. The head of Vulcan Rapid can be seen at the mouth of Prospect Canyon at lower left
Manuscripts
mssMarston papers V083/0131

South in Toroweap Valley to Vulcans Throne and the Colorado River Gorge at Mile 178-180
Manuscripts
mssMarston papers V083/0110
