The 1983-1997 Accessions subgroup is divided into ten series: Calvin Cunningham case, Clippings, Correspondence, Government documents, Lake County materials, Memorial materials, Personal material, Political Organizations, Press Releases and Publicity, and Print and Broadcast Material.
The Calvin Cunningham case series (1983-1996) consists of material concerning Williams' advocacy on behalf of a death-row inmate, Calvin Cunningham. In 1991, Cunningham was convicted of murder in the 1990 shooting death of a policeman in Charlotte, North Carolina. Cunningham maintained his innocence.
The Clippings series (1957-1996) consists of clippings from American and international newspapers and magazines concerning Robert Williams.