The collection comprises late nineteenth century lists, abstracts and transcripts of deeds and documents of Rhys family and Dynevor estate interest, 31 Edw. I-1720; newspaper cuttings and letters relating to Charles A. U. Rhys, 8th Baron, 1918-1930; correspondence and papers relating to the publications of the Black Raven Press, a publishing company owned by Richard Rhys, 9th Lord Dynevor, 1965-1985; and typescript scripts of productions by the Richard Rhys production company, also owned by Lord Dynevor, 1961-1982. These include works by the following playwrights: Gerald Hanley, James Hanley, Gwyn Thomas and R. S. Thomas.