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ContributorsZachau, Bernie (Author)
Created1917-02-17
Description

Letter from Bernie Zachau to Carl Hayden regarding water power in the Grand Canyon.

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ContributorsSmith, George Otis (Author)
Created1918-05-01
Description

Letter from George Otis Smith to Carl Hayden regarding mining rights in the Grand Canyon.

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ContributorsSmith, George Otis (Author)
Created1918-04-23
Description

Letter from George Otis Smith, U.S. Geological Survey to Carl Hayden regarding asbestos mining prospects in the Grand Canyon.

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ContributorsLane, Franklin K. (Author)
Created1916-02-26
Description

Letter from Franklin K. Lane to Carl T. Hayden expressing his support for bill S.390 in establishing the Grand Canyon as a National Park.

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ContributorsLane, Franklin K. (Author)
Description

Letter from Franklin K. Lane expressing his support for bill S.390 in establishing the Grand Canyon as a National Park. Circa 1913-1920.

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ContributorsMatthes, F. (Author) / Evans, R. T. (Author) / The Military engineer (Publisher)
Created1926-05
DescriptionGeological Survey of the Grand Canyon in published journal. Vol. XVIII, No. 99.