Filtering by
- All Subjects: Mining
- All Subjects: Havasupai Reservation (Ariz.)
- All Subjects: Heard, Dwight Bancroft, 1869-1929
- All Subjects: Rickel, Joseph B., 1895-1974
- All Subjects: Williams, Lawrence S., 1868-1946
- Creators: Hayden, Carl T.
Letter from Carl Hayden to H. F. Robinson with attached notes from W. W. Bass and C. H. Gensler. Hayden solitices advice concerning the Havasupai Tribe needs for grazing and access to natural resources.
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 T. Hayden to Louis C. Cramton about potential prosecution of people with mining claims within park boundaries.
Letter from Carl T. Hayden to J. B. Rickel concerning proposed changes to Grand Canyon National Park boundaries.
Letter from Carl T. Hayden to Alf Dickenson about mine locations within the park.