Filtering by
- All Subjects: Bright Angel Trail (Ariz.)
- All Subjects: Mining
- All Subjects: Bolton, George Claybrook Sr., 1888-1959
- All Subjects: Gold, Frank M., 1878-1976
- All Subjects: Heard, Dwight Bancroft, 1869-1929
- All Subjects: World War I
- Creators: Hayden, Carl T.
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 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 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 L. L. Ferrall on the favorable conditions for creating a national park and the prospect of the United States entering WW I.
Letter from Carl Hayden to M. J. Riordan expressing his support for Coconino County in turning over the Bright Angel Trail to the federal government.
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 George C. Bolton on behalf of Bankhead and Henderson in regards to their sheep grazing permit.
Letter from Carl T. Hayden to Alf Dickenson about mine locations within the park.