Manuscripts
Up Grand Canyon from Mile 240.2 showing Rapid 248 by Cogswell's tally and he also numbered it #4, part of Separation Rapid
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Up at Desolation Canyon at Mile 40.5 showing the rapid which Cogswell counted as #51
Manuscripts
mssMarston papers V117/0116

Route up to lava cap at Lava Cliff. Rapid used for portage of dunnage. Grand Canyon. Mile 246
Manuscripts
mssMarston papers V141/0093



