Papers of D. Emlyn Thomas, 1936-1954, mainly constituency correspondence, 1946-1954, as Labour Member of Parliament for the Aberdare division of Glamorganshire; and pocket diaries, 1937-1954, containing brief notes of appointments and other comments.

Correspondence, 1901-1908, relating to the establishment of Independent Labour Party (ILP) branches in and around Swansea. Included are letters from Charles Duncan of the Workers' Union, John Penny, J. Bruce Glasier and Philip Snowden of the Independent Labour Party, and include references to Keir Hardie and J. Littlejohns. The majority of the letters are to Matt Giles, who became the first full time organiser for the ILP in Wales.

Papers, 1966-2001, relating to the Newport West Labour Party; the Newport County Borough Council Labour Group; the Manufacturing, Science and Finance Union (MSF), Newport 9909 Branch; the South East Wales European Constituency Labour Party, and various election campaigns, including correspondence, minutes, financial records, reports and material relating to election campaigns.

An additional file of letters, 1956-1957, and printed leaflets etc., 2005-2006, relating to the Labour Party's activities in Newport West constituency were received. This group remains uncatalogued.

Additional papers of the donor, MP for Newport West and former member of Gwent County Council, mainly relating to local, Parliamentary and European elections, and in particular to the 2001 election. This group remains uncatalogued.

Political and professional papers of W. H. Mainwaring, 1910-1970, including papers relating to the Cambrian Combine Collieries dispute, 1910-1911; the manuscript of the publication, The Miners' Next Step, 1912; papers relating to the South Wales Miners' Idustrial Union, 1928-1932; correspondence, 1905-1970, and pamphlets of economic and Socialist interest, [late 19th cent.] - [early 20th cent.].