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ContributorsHayden, Carl T. (Author) / Smith, George Otih (Author)
Created1918-04-25
Description

Letter from Carl Hayden to George Otis Smith asking his advice regarding the mining of asbestos deposits in the Grand Canyon.

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ContributorsHayden, Carl T. (Author)
Created1924-08-06
Description

Letter from Carl T. Hayden to Louis C. Cramton about potential prosecution of people with mining claims within park boundaries.

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ContributorsHayden, Carl T. (Author)
Created1926-06-12
Description

Letter from Carl T. Hayden to Alf Dickenson about mine locations within the park.

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Created1926-04-02
DescriptionGrand Canyon National Park General Regulations.
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Created1929
Description

Typescript report, black and white, describing the mammals of Grand Canyon National Park with cover drawing of a bighorn sheep.

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Created1929-02-28
DescriptionMonthly bulletin, black and white, describing the natural history and scientific features of Grand Canyon National Park. This volume is dedicated in memoriam to Glen E. Sturdevant, park naturalist, and Fred Johnson, park ranger, who drowned while collecting specimens in the park.