Manuscripts
Dock Marston explaining the meanings of the two plaques at Separation Canyon during the History Workshop of Grand Canyon Expeditions, Inc
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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
Manuscripts
mssMarston papers V097/0191
Dock Marston during the cruise of Grand Canyon Expeditions in 1974, May
Manuscripts
mssMarston papers V163/0168
Jim Bailey, Harvey Butchart, Dock Marston at the replacing of the 1934 plaque at Separation Canyon 1971, Nov. 27
Manuscripts
mssMarston papers V097/0171
Margaret Marston explains to Dock some of the activities on the rim during the Grand Canyon cruise
Manuscripts
mssMarston papers V100/0081
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
