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- All Subjects: Dynamite
- All Subjects: Campbell, Gilbert Alan, 1906-1985
- All Subjects: Hopi Tribe of Arizona
- All Subjects: Breen, Fred Sylvester, 1869-1932
- All Subjects: Havasupai Point
- Member of: 100 Years of Grand: The Grand Canyon Centennial Project
Letter from Ed Hamilton to Carl Hayden regarding the storage of dynamite in Shoski Canyon.
Letter from A. E. Demaray to Carl Hayden regarding the storage of dynamite in Shoski Canyon.
Letter from Arno B. Cammerer to Carl Hayden regarding the storage of dynamite in Shoski Canyon.
Letter from Fred Breen to Carl Hayden regarding the sale of Bright Angel Trail.
Letter from Carl Hayden to Fred S. Breen regarding Yaki Point, the sale of Bright Angel Trail and the building of a road between Maine and the Grand Canyon.
Letter from Fred Harvey to Senator Carl Hayden on the diary of Padre Francisco Garcés and his entry on July 4, 1776.
Letter from Fred Harvey to Senator Carl Hayden on the diary of Padre Francisco Garcés and the lack of knowledge of U.S. citizens regarding the Hopi people.
Letter from Jesse L. Boyce to Carl Hayden stating there is 30 tons of dynamite located in the Grand Canyon near tourist sites.
Letter from Arno B. Cammerer to Carl Hayden reiterating the safe nature of the dynamite storage.
Letter from unknown author (possibly Jack) to Jesse L. Boyce regarding his complaint concerning the TNT located in the Grand Canyon. Enclosed is Superintendent Crosby's report in which he states that the current housing location of the TNT is not a threat to anyone.