Letter from Harold Greene to Carl Hayden regarding the proposed boundaries for the national park bill.

Letter from C. D. Dawson to Carl Hayden urging him to consider the rights of miners and farmers when drawing up the boundaries for the proposed park.

Letter from Charles H. Akers to Carl Hayden expressing his support for the National Park bill.

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