Across all the correspondence, the localities include both individual places and institutions and widely dispersed or sparsely settled areas in clusters of places with a number of institutions not listed on the folder headings, e.g. "Arizona Territory, Pima Agency, Papago Reservation." Filed at the end of these areas is Bureau general correspondence pertaining to two or more missions or schools within it, e.g. "Alaska, General Correspondence.
Retrospective Additions and special compilations, 1873-1976: Included is correspondence acquired after 2000 and not microfilmed; a compilation of Bureau correspondence by Native American correspondents selected from throughout the general correspondence, 1873-1975; and a compilation of Bureau and Collection legal documents and minutes of meetings by their boards of directors, 1876-1976.
Reformatted records: The microfilm version of the Series 1-1 Correspondence is available via interlibrary loan within the United States; please follow the Guidelines for Interlibrary Loans.