The fonds consists of Russell's manuscripts, correspondence, library, periodicals, offprints, leaflets, photographs, audio discs, audio reels, audio cassettes, films, videocassettes, microfilms, news clippings, posters, some furniture, artwork (including a bust by Jacob Epstein), awards and medals. Also included are records of the Bertrand Russell Peace Foundation, including those that relate to the International War Crimes Tribunal. The archive is supplemented by a supporting research library of books, theses about Russell, and his publications in periodicals. The fonds also contains the archives of Russell's parents, Viscount and Viscountess Amberley. The fonds has been supplemented with ongoing acquisitions of original material from a variety of sources, as well as copies of selected material held elsewhere.