This series is mainly comprised of general correspondence between an affiliate and the national office of the NFB. Arrangement varies by affiliate, but is sometimes subdivided by person or subject. Also includes correspondence with state agencies and services for the blind, as well as correspondence concerning grants made by the national office. Most correspondence dated before 1978 is housed separately and is arranged by state and date received in reverse chronological order. The only exception to this arrangement in the pre-1978 materials is found in the records for the Iowa Affiliate, which is divided alphabetically by subject. Early materials for the Iowa Affiliate also include correspondence between Jacobus tenBroek and Kenneth Jernigan.