Papers relating to fringe Nationalist and left wing groups, 1963-1989, including material relating to Welsh Nationalist and Republican Groups, 1963-1989, material relating to Welsh left wing groups, 1969-1979, and papers relating to solidarity groups and campaigns, 1968-1989; published political material such as newspapers and periodicals, 1913-1989, records and papers of Cofiwn, 1970-1990, including material relating to the American Indian Movement Tour of Wales, 1986; papers relating to campaigns and activities of groups such as the the Owain Glyndwr Society, 1975-1990; papers relating to maritime history and heritage, 1973-1995; and miscellaneous papers, mainly relating to organisations in Aberystwyth, 1976-1989.

Papers of Richard Emrys Bonsall, mainly architectural papers relating to buildings in the Aberystwyth area, Cardiganshire, 1930-1964, including notebook with architectural notes, [c. 1930]-1935; diary of Hywel Owen Jones, 1930-1933; contract certificate counterfoils, 1938-1963; building specifications, 1946-1964; papers relating to alterations to the Wynnstay Arms Hotel, Oswestry and the Royal Hotel, Llangollen, 1955-1964; and copy letters from him, 1959-1961.