The Society for the Second Self Collection contains the records of Tri-Ess and its chapters from its inception in 1973 through 2006. The collection consists of correspondence, directories, corporate documents, flyers, ephemera, newsletters, and photographs. There is considerable documentation on the initial organization of Tri-Ess and numerous publications about cross-dressing. The latter part of the collection is primarily comprised of correspondence between cross-dressers and academics researching the cross-dressing movement. Correspondents with two or more letters are filed by last name. The collection is divided into five major series: Corporate Knowledge (1973-2000), Executive Correspondence (1992-2003), Publications (1977-2004), Correspondence (1981-2006), and Audio-Visual Materials (1993).
Series I, Corporate Knowledge, is divided into five subseries: Initial Organization of Tri-Ess (1973-2000), Executive Administration (1985-1998), Chapter Administration (1975-2000), Chapters (1991-1997), and Membership Activities (1978-1998). Subseries A, Initial Organization of Tri-Ess, contains constitutions, chapter bylaws, and personal biographies of essential personnel. Subseries B, Executive Administration, contains advertisements, Board of Director minutes, and correspondence. Subseries C, Chapter Administration, consists of correspondence, bylaws, and charters. Subseries D, Chapters, contains individual chapter records. Subseries E, Membership Activities, includes directories, newspaper clippings, and membership records. Each of these subseries are arranged alphabetically.
Series II, Executive Correspondence, is divided into three subseries: Correspondence from the Board of Directors (1992-2002), Correspondence to the Board of Directors (1993-2000), and Executive Directorship (1993-2003). Each of these subseries are arranged alphabetically.
Series III, Publications, includes catalogs, directories, magazines, and other associated publications, arranged alphabetically by title or subject.
Series IV, Correspondence, is divided into two subseries, Files A-Z (1981-2003) and Single Letters (1989-2006). Subseries A, Files A-Z, is arranged alphabetically. Subseries B, Single Letters, is arranged chronologically.
Series V, Audio-Visual Materials, primarily consists of audio cassettes and photographs.