The collection contains records of the activities of the First Century Families, especially centered on the planning and implementation of the group's annual luncheon. Much of the material was preserved and collected by Christine Shirley, the organization's historian; there is also correspondence between Shirley and members of the organization. The collection contains general administrative files, including correspondence with members; programs, photographs, slides, and typescripts of presentations of, and planning documents for, many of the organization's annual luncheons; books, clippings, typescripts and other materials on the history of early Los Angeles families and aspects of Los Angeles history; and clippings documenting the organization's annual luncheons. The collection also includes 22.4 gigabytes of audio and video files.