Manuscripts
Dock Marston ties the history with the two plaques at the mouth of Separation Canyon during the History Workshop cruise of Grand Canyon Expeditions, Inc
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Dock Marston explaining the meanings of the two plaques at Separation Canyon during the History Workshop of Grand Canyon Expeditions, Inc
Manuscripts
mssMarston papers V097/0190

Dock Marston drops a few items of history; Grand Canyon Expeditions cruise
Manuscripts
mssMarston papers V163/0167

Jim Bailey, Harvey Butchart, Dock Marston at the replacing of the 1934 plaque at Separation Canyon 1971, Nov. 27
Manuscripts
mssMarston papers V097/0171

Marston-Disney craft in the lagoon at mouth of Separation Canyon
Manuscripts
mssMarston papers V097/0203

Dock Marston and Frankie Strathairn after 1934 plaque had been set and braced for hardening of adjesive at Separation Canyon
Manuscripts
mssMarston papers V097/0186
