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Letter from Arno B. Cammerer to Carl Hayden informing him that Superintendent Tillotson will submit a report on the conditions of the road between Grand Canyon Village and Rowe's Well.
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Letter from Arno B. Cammerer to Carl Hayden denying his request for funding to repair the road between Grand Canyon Village and Rowe's Well.
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Letter from Arno B. Cammerer to Carl Hayden on building a Union Chapel in the Grand Canyon.
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Letter from Arno B. Cammerer to Carl Hayden regarding the storage of dynamite in Shoski Canyon. Written in red pencil at the top, "My dear Jesse, For your(?) further information, Jack."
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Letter from Arno B. Cammerer to Carl Hayden on the investigation by Superintendent Crosby regarding the TNT stored in the Grand Canyon.
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Letter from Arno B. Cammerer to Carl Hayden informing him of the removal of the dynamite from Grand Canyon Village to a point near Rowe Well.
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Letter from Arno B. Cammerer to J. R. Eakin describing the procedure for purchasing Bright Angel Trail.
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Proposed admission fees to Grand Canyon National Park.
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