Election addresses and leaflets circulated in various constituencies including East Glamorgan Division, Mid-Glamorgan, Merthyr Boroughs and Breconshire during the December 1910 General Election.

Papers of the Aberystwyth "No Assembly" Campaign, 1975-1981, including correspondence, 1975-1981; pamphlets, leaflets, circular letters, stickers, 1976-1979; financial records, 1978-1979; press releases, 1978-1979 and press cuttings, 1975-1979.

Addresses relating to the political scene in Wales, written by Saunders Lewis on behalf of his daughter, Mair Saunders Jones, the donor; three are from the late 1940s and another from the 1950s.

Parliament for Wales Campaign records, 1988-2000, including minutes, accounts, correspondence, and files relating to membership, branches, policy, activities and publications.

A further consignment of papers were recived comprising correspondence, minutes of meetings and financial papers. This group remains uncatalogued.

Records of the Committee of Welsh District Councils, comprising correspondence and papers of the Committee, 1983-1989, together with related papers of the Association of District Councils, 1981-1991, the Representative Body for Wales, 1974-1988, and the Council of Welsh Districts, 1989-1991.

Constituency polls, 1987-2003, comprising tabulated results of opinion polls, prepared by NOP and Beaufort Research Limited, carried out in various constituencies across Wales to assess voting intentions and behaviour, and to examine public opinion on local issues.

Letters mainly addressed to E. W. Evans, largely in connection with contributions to Y Goleuad and other publications.
The correspondents include G. Osborne Morgan, Wrexham, etc., 1887-1895 and [n.d.] (opposition to the erection of a chapel, Local Government Bill, etc.); John Morgan, Cardiff, 1901 (the case of W. O. Jones); W. Prichard-Morgan, [M.P. for Merthyr Tydfil], 1892 (interference in an appointment outside the writer’s constituency); John Morley, viscount Morley of Blackburn, 1887 (declining to write a letter); T. E. Morris, Porthmadog, 1900 (the writer’s biography, in connection with the Merioneth parliamentary election); P. D. Morse, Wolf’s Castle, 1901 (the case of W. O. Jones); Max Nettlau, Bloomsbury, 1888 (the writer’s study of Welsh dialects); Thomas George Baring, 1st earl of Northbrook, 1887 (Disestablishment); David Owen, solicitor, Bangor, 1901 (the case of W. O. Jones); J. Owen, The Deanery, St. Asaph, 1889 (declining an invitation to write to Y Goleuad); L. Owen, Llanfihangel [Glyn Myfyr], Corwen [1901] (the case of W. O. Jones); Owen J. Owen, Rockferry, 1901 (the case of W. O. Jones, the proposed Liverpool edition of Y Goleuad), with a copy reply; John Parry, Llanarmon, Mold, 1888 (a contribution to Cymru Fydd); Love Jones Parry [Madryn], 1885; Robert Parry (Robyn Ddu Eryri), Ludlow (contributions to Y Goleuad, etc.); D. Phillips, Swansea, 1890 (a publication for the writer); D. Phillips, Glogue, Llanfyrnach, 1901 (contribution to Y Goleuad, a mis-quotation by Y Tyst from Y Goleuad); Thomas Powel, University College, Cardiff, 1889 (a contribution to Y Goleuad on book-reading); Pryce Pryce-Jones, Newtown, [n.d.] (the purchase of the first number of Merionethshire News); Owen Prys, Trevecca College, etc., 1895 and [n.d.] (condolence, the function of Bala and Trevecca Colleges); Hugh Pugh [of Mostyn], [n.d.] (Mary Jones and the British and Foreign Bible Society); and H. J. Ellis Nanney, Criccieth, 1888 and [n.d.] (the writer’s treatment of the recipient’s uncle).

Letters mainly addressed to E. W. Evans, with some to William Williams, Dolgellau, and others largely in connection with contributions to Y Goleuad and other publications.
The correspondents include Alfred George Edwards, bishop of St. Asaph, 1890; Griffith Ellis, Bootle, 1886, with copies of letters of E. W. Evans, 1885-1886 (a controversy over the publication of the writer's Hanes Methodistiaeth Corris); Thomas E[dward] Ellis, Cynlas, Llandderfel, etc., 1884-1896, with copies and drafts of letters of E. W. Evans (contributions to Y Goleuad, the editorship of Cymru Fydd, the publication of Merionethshire News, the eviction of the recipient's father David Evans, Cae Einion, Dolgellau, and other tenants of H. J. Ellis Nanney, Liberal nominations in local government elections); De Charles Evans, Conway, 1901 (the case of W. O. Jones); D. Silvan Evans, Llanwrin Rectory, 1888-1898 (hymnology, editions of the Welsh Prayer Book, the publication of the writer's Welsh Dictionary?); J. Daniel Evans, Garston, 1901; John Evans, Aber Rectory, 1889; Thomas John Evans, Llanfynydd School, Mold, 1867 (personal); William Evans, Liverpool, 1901-1902 (the case of W. O. Jones); W. Wynn Evans, solicitor, Wrexham, 1901 (proceedings against the recipient); Thomas Gee, Denbigh, 1891 (contributions to Y Gwyddoniadur Cymreig); J. Monro Gibson, South Hampstead, 1907; Richard Glover, Bristol, 1908; and Ellis Griffith, Cambridge, 1887 (the editorship of Cymru Fydd).

Papers of the late D. Elwyn Jones, Conservative Agent for North Wales, comprising theological papers connected with his early desire to join the ministry, [1962x1970]; correspondence mainly associated with his work as a Conservative Party agent, 1964-2001; material directly connected with his political activity, 1966-2003; several files concerning Conservative Party group visits to European political institutions, 1981-1986; material regarding D. Elwyn Jones' appearance on certain television programmes, 1985-1989; a number of appointment diaries, 1971-1983; a small amount of reference material, 1964-2003; several scrapbooks, 1967-1999; numerous newspaper cuttings and articles, 1968-2001; and papers and publications concerning the Advisory Committee of the Welsh Political Archive, 1983-2001.

Twenty six letters, 1922-1937, from D. J. Williams, Fishguard, to Flora Forster. They relate mainly to their personal relationship, but also contain references to his imprisonment, 1937 (ff. 48-9), George M. Ll. Davies (ff. 29 verso-30, 41), the 1922 parliamentary election (ff. 1-3), Saunders Lewis (f. 14 verso), and Welsh nationalism (ff. 45-8).

Comprises material relating to the the campaign to ensure that devolution proposals for Wales were included in legislation and the financial affairs of the pro devolution campaign in Ceredigion.

Wyn Roberts' diary from April 1976 to October 1977.

Wyn Roberts' diary from November 1977 to May 1979.

Political papers, 1944-1991, of Donald Richard Coleman, including correspondence files, 1964-1991, mainly of political interest; papers concerning the Labour Party, 1964-1990, many relating to the Labour Party Wales; and files, 1944-1990, relating to various subjects.

Papers relating to the life and career of Edward Morgan Humphreys, including letters to E. Morgan Humphreys, from several prominent Welsh figures, 1900x1955, relating to professional matters, such as his articles and contributions to newspapers, requests for articles, radio talks, addresses, literary works, public appointments, his involvement with the eisteddfod and various committees; together with some letters relating to personal affairs, politics and literary matters and letters written to him in his role as an editor; miscellaneous and family ('Dyffryn') correspondence, which are mostly letters of the families of E. Morgan Humphreys' great-grandfather, the Rev Richard Humphreys, and of his grandfather, the Rev Edward Morgan, [1800]x1953; articles, radio scripts and addresses by E. Morgan Humphreys, 1902x1955; together with some personal and family papers, 1841x1955; articles, poetry, adjudications and letters to the editor of Y Genedl etc., by T. Gwynn Jones, 1890x1949; and other miscellaneous papers accumulated by E. Morgan Humphreys, [1762]x1955. Some of the family correspondence was published in 'Some Nineteenth Century Letters', in The Transactions of the Honourable Society of Cymmrodorion, 1925-1926.

The fonds comprises letters, 1928-1999, to Lady White, diaries, 1936-1984, papers, 1907-1994, reflecting her career as a Labour politician, papers, 1859-1994, concerning her outside interests and activities, records, 1950-1996, deriving from Lady White's involvement in Welsh political and public life, and material, 1960-1990, concerning her activities in educational matters. There are also family papers, 1892-1992, including some relating to Lady White's father Dr Thomas Jones CH (1870-1955) and to her husband John Cameron White (1911-1968). There is also a substantial group of press cuttings and other printed material, 1919-1997. A further two boxes of papers were received in January 2007; this group remains uncatalogued.

The group consists of material relating to Communist Party election campaigns in Britain, but mainly in Wales, including election manifestos, 1964-1987, elections results, 1945-1995, files relating to election campaign arrangements, 1934-1987, electoral reform, 1964-1996, general election leaflets, 1935-1989, and local election leaflets, 1946-1992.

The catalogued portion of the archive contains records of the family of Owen, later Humphreys-Owen, of Glansevern, and Johnes of Garthmyl, mainly comprising title deeds and documents, [late 12 cent.]-1929, mainly relating to property in Montgomeryshire; estate papers, 1767-1924, including rentals, accounts and surveys; records relating to Campobello island, New Brunswick, Canada, 1767-1902; substantial family correspondence, 1633-1926, political correspondence of Arthur Charles Humphreys-Owen, 1856-1905, including letters from Lord Rendel; naval papers of Captain William Owen, 1746-1778, [c. 1797]. The uncatalogued part of the archive includes correspondence of the Owen and Humphreys-Owen families, 1754-1905; pedigree of the Owen family, 1839; and material relating to S. P. F. Humphreys Owen, [c. mid 20 cent].

Comprises Gwilym Prys-Davies' political papers, 1954-2008, including letters, articles, minutes and reports, as well as subject files, 1912-2012, and letters between Harri Webb and John Legona and some papers relating to William Abraham (Mabon). The papers relate mainly to devolution, Welsh language legislation, language rights and contain files relating to the Welsh Republican Movement and civil rights group Cefn.
Papers relating to the funeral of Gwilym Prys Davies, 8 April 2017, comprising the order of service, tributes and a booklet containing family photographs; April 2017.
Five letters, 2005-2006, from Gwilym Prys Davies to Prys Davies and Meri Huws of the Welsh Language Board, together with three attached documents; September 2018.

Letters addressed to Huw T. Edwards, 1929-1970, and carbon copies of letters sent by him, 1945-1969, concerning politics, literature, and the Council for Wales and Monmouthshire, including letters to and from political figures in the Labour Party and Plaid Cymru, and Welsh literary figures; pocket diaries, 1929-1968; minute books of the North Wales Labour Federation, 1923-1930; reports and memoranda concerning the activities of the Council for Wales and Monmouthshire, political life in North Wales, and the activities of TWW, 1935-1966; press cuttings relating to Edwards' political career and the activities of the Council for Wales and Monmouthshire, 1930-1968; illuminated addresses and distinctions presented to him, 1933-1969; miscellaneous printed items, 1912-1967; poems by him, 1950-1958; and other personal papers, 1926-1967; and acquired papers, notably letters from Sir Owen M. Edwards to Hughes and Son, Wrexham, printers, 1894-1895.