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- All Subjects: Albright, Horace Marden, 1890-1987
- All Subjects: Arizona. Legislature
- All Subjects: Heard, Dwight Bancroft, 1869-1929
- All Subjects: World War I
- Creators: Hayden, Carl T.
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 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 Horace M. Albright regarding the grazing rights of Bankhead and Henderson.
Letter from Carl Hayden to C. H. Akers on the opposition to the Grand Canyon bill from A. A. Johns, J. W. Sullivan, Jesse Hoyce, T. E. Cureton, and Hugh Campbell. Hayden mentions his failure to contact the governor before the present special session, but expresses hope of the legislature passing a memorial on the subject.