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 Franklin K. Lane expressing his support for bill S.390 in establishing the Grand Canyon as a National Park. Circa 1913-1920.

Letter from Robert Fechner to Carl Hayden on building a Union Chapel in the Grand Canyon.

Letter from Alf Dickenson to Carl T. Hayden about securing mining permits within the park.