Deeds and papers relating to lands of the Hopkin family and others in the parish of Betws, Carmarthenshire, 1594-1748; papers relating to the Hopkin family, 1719-1898; and a poor rate account for the parish of Betws, 1818.

Letters, newspaper cuttings, notes, pamphlets and periodicals, typescripts, reports, volumes of parliamentary debates, and other papers of James Griffiths relating to the following: the coal industry and the South Wales Miners' Federation, 1912-1967; the Labour Party, 1919-1975; the Central Labour College, 1919-1922; National Insurance, 1931-1954; the Colonies, 1939-1972; his work as Secretary of State for Wales, 1964-1966; papers relating to Welsh affairs including devolution, the Welsh Reconstruction Advisory Council, education and local government reorganization, 1935-1975; constituency affairs, 1937-1969; overseas visits, 1936-1968; the Nigeria-Biafra War, 1968-1970; papers relating to his autobiography Pages from Memory, including letters from Gwilym Prys Davies and others, 1961-1969, notebooks, [1960s], typescripts, [1964]-1969, and cuttings of reviews, 1969; unpublished reminiscences, 1955-1974; notes and typescripts for lectures and speeches, 1940-1971; typescripts of broadcasts by Griffiths, 1937-1967; typescripts of articles and reviews, 1940-1974; newspaper cuttings, 1919-1974; and other miscellaneous personal matter, [1930s]-1975; and papers relating to Mrs Silyn Roberts, 1897-1954.