Filtering by
- All Subjects: Mather, Stephen Tyng, 1867-1930
- All Subjects: Mining
- All Subjects: Moran, Patrick Joseph, 1864-1936
- All Subjects: Gilliland, Richard P., 1883-1966
- All Subjects: Heard, Dwight Bancroft, 1869-1929
- Creators: Hayden, Carl T.
Letter from Carl Hayden to George Otis Smith asking his advice regarding the mining of asbestos deposits in the Grand Canyon.
Letter of introduction for Dwight B. Heard on the arrival of National Park Service Director Stephen T. Mather to Phoenix. Mather's visit includes trips to Roosevelt Dam and Tumacácori.
Letter from Carl Hayden to Stephen Mather regarding Coconino County's willingness to dispose of Bright Angel Trail as long as the funds acquired would go to building a road between Old Trails Highway at Maine to the Grand Canyon.
Letter from Carl Hayden to Stephen T. Mather regarding certain amendments to the national park bill. Rights regarding the Havasupai Tribe are mentioned.
Letter from Carl T. Hayden to Louis C. Cramton about potential prosecution of people with mining claims within park boundaries.
Letter from Carl T. Hayden to P. J. Moran concerning the alignment of the road to Bright Angel Trail.
Letter from Carl T. Hayden to Alf Dickenson about mine locations within the park.
Letter from Carl Hayden to R.P Gilliland regarding the sale of Bright Angel Trail (Ariz.) and construction of the President's Highway from Maine, AZ to the Grand Canyon.
Letter from Arno B. Cammerer to Carl Hayden regarding the storage of dynamite in Shoski Canyon.