The AJSS maintained a chronological mail file periodically throughout the 1950s and 1960s, and then continuously from 1970-1984. The file comprises both incoming and outgoing administrative correspondence with attachments. Included is correspondence with project camp directors, campers, officials from project sites, and donors. Camper address lists for the time period 1951-1970 are also included. Researchers should also consult correspondence in Series I, Administrative records.