Manuscripts
Jack Brennan handling his glass outboard boat with the oars. Mile 47. Triple Alcoves
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Jack Brennan in his glass outboard boat "Jax" on the jet of Vulcan Rapid
Manuscripts
mssMarston papers V085/0076

Jack Brennan in his outboard glass boat in Vulcan Rapid. The single outboard motor stopped during the run
Manuscripts
mssMarston papers V085/0079

Jack Brennan puts the glass outboard boat through Soap Creek Rapid
Manuscripts
mssMarston papers V044/0091

Jack Brennan, in his glass outboard unit, cuts out of the rough water at Mile 24.5
Manuscripts
mssMarston papers V047/0057
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Saddle Canyon (Mile 47.1), the third of Triple Alcoves; Wildcat Cave - Mile 47-48
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
