Manuscripts
Camp at upper end of The Switching Yard
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John Schulz tells of the geology. Camp at lower end of Stanton's Switching Yard
Manuscripts
mssMarston papers V072/0107

Up past Shinumo Rapid to lower end of Stanton's Switching Yard. Hotauta Canyon is upper right
Manuscripts
mssMarston papers V072/0200

At camp at lower end of Switching Yard. Mile 108. Garth Marston; Larry Sanderson; John Schulz; Chuck Richey
Manuscripts
mssMarston papers V072/0106

Camp at upper end of Stantons Switching Yard. Prel. Bright Angel gauge: June 15: 108,500. June 16: 103,000
Manuscripts
mssMarston papers P006/0103

John Schulz explains the geology; Camp at lower end of Switching Yard, Mile 108
Manuscripts
mssMarston papers V168/0071
