- All Subjects: Coconino County
- All Subjects: Gilliland, Richard P., 1883-1966
- All Subjects: Heard, Dwight Bancroft, 1869-1929
- Creators: Hayden, Carl T.
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 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.