Correspondence to and from Henderson, Indian reports written and collected by Henderson. Folder one contains correspondence between Henderson and Malcolm McDowell while Henderson was stationed at Camp Sheridan, Montgomery, Alabama. The reports are mostly typescript copies. Those in folder two are published documents and include documents pertaining to the Havasupai Indian Agency, Arizona, Supai Trail, reorganization of the Indian service. Folder three has all handwritten items regarding the State of Washington Indian treaties, including notes titled "Washington Notes", map of Fort Hall Reservation, Idaho, unbound manuscript titled "Lands of Indians in the State of Washington West of the Cascade Mountains." Folder four contains typed notes by Henderson titled "Notes on Acoma Pueblo", 1919. Folder five contains Board of Indian Commissioners' reports regarding the Crow Creek, and Lower Brule Indian Reservations, South Dakota, Cherokee Indian Reservation, North Carolina, Choctaw Indians of Mississippi, and a history of the Indian Bureau from 1824 to 1924.

Folder six, typed reports regarding Cherokee Indians of North Carolina and Choctaw Indians of Mississippi, 1927. Also correspondence from Charles H. Burke to McDowell discussing Henderson's work with the Cherokees. Folder seven, reports regarding the Havasupai, Truxton, and Colorado River, Indian Agencies in Arizona, and the Fort Yuma Indian Agency in California, also the Fort Mojave Indian School. Folder eight, reports regarding Neah Bay, and Tahola, Indian Agencies. Folder nine, reports on Tulalip Indian Agencies in Washington and the Nonreservation Indians at the Carson Agency in Nevada. Folder ten, reports regarding the Walker River Indian Agency and Western Shoshone Indian Reservation in Nevada. Folder eleven, reports regarding the Paiute Indian Agency in Utah and the Sells Indian Agency in Arizona. Multiple copies of most of the reports.