Filtering by
- All Subjects: Mining
- All Subjects: Heard, Dwight Bancroft, 1869-1929
- All Subjects: Williams, Lawrence S., 1868-1946
- Creators: Hayden, Carl T.
- Creators: Bass, W. W.
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 W. W. Bass to Carl Hayden requesting the boundaries of the park be reconsidered as a large portion of the land is suitable for mining and farming.
Letter from W. W. Bass to Carl Hayden concerning the mining of asbestos in the Grand Canyon.
Letter from W. W. Bass to Carl Hayden urging him to visit the Grand Canyon in order to see what effect the National Park bill would have on the farmers and miners of the Grand Canyon. Bass urges Hayden to "correct a threatening evil" and the monopoly such a proposal would give to the Santa Fe Railway line, includes newspaper clipping.
Letter from Carl Hayden to George Otis Smith asking his advice regarding the mining of asbestos deposits in the Grand Canyon.
Letter from Carl T. Hayden to Alf Dickenson about mine locations within the park.
Letter from Carl T. Hayden to Louis C. Cramton about potential prosecution of people with mining claims within park boundaries.