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- All Subjects: Hayden, Carl Trumbull, 1877-1972
- All Subjects: Phnom Penh (Cambodia)
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 Fred Breen to Carl Hayden regarding the sale of Bright Angel Trail.
Letter from Carl Hayden to W. W. Bass on the recent amendments made to the national park bill.
Letter from W. W. Bass to Carl Hayden arguing for a delay in the national park bill proceedings.
Letter to W. W. Bass from Carl Hayden's secretary informing him of a vote on the national park bill will not be held until December.
Letter from W. W. Bass to Carl Hayden opposing the Grand Canyon National Park bill in its current form.
Letter from Franklin K. Lane to Carl T. Hayden expressing his support for bill S.390 in establishing the Grand Canyon as a National Park.
Letter from T. E. Pollock to Carl Hayden expressing his dissatisfaction with the proposed boundaries in the national park bill.
Letter from T. E. Pollock to Carl Hayden asking his opinion on the proposed boundary lines.