Manuscripts
Spring found by Ervin in 1931 after climb from inner gorge as it flows over the Tapeats formation
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Ravine above spring found by Ervin in 1931 after climb from inner gorge
Manuscripts
mssMarston papers P007/0792

Ravine above spring found by Ervin in 1931 above in the inner gorge
Manuscripts
mssMarston papers P007/0797

Pre-Cambrian just below the Tapeats on the 1931 climbing route used by Ervin
Manuscripts
mssMarston papers P007/0804

Middle part of the climbing route used by Ervin in 1931 to escape the inner gorge above 234 Mile Rapid
Manuscripts
mssMarston papers V095/0056

