Papers of D. A. Thomas, Viscount Rhondda, including letters to D. A. Thomas on political matters such as working conditions in the mining industry, education, church disestablishment, and the temperance movement, 1891-1910 (mainly 1891-1895); drafts and copies of letters from D. A. Thomas on similar subjects, 1891-1895; miscellaneous letters, 1893-1895; subject files, 1874-1917, on the coal industry, including the Cambrian Navigation Collieries, the Mining Association of Great Britain, the South Wales Liberal Federation, temperance and disestablishment; scrapbooks of press cuttings, 1894-1927, relating to Cymru Fydd, D.A Thomas, Merthyr politics and Keir Hardie, the Lusitania, and Lady Rhondda; miscellaneous items, 1897-1934, including genealogical material and congratulatory addresses to D.A.T.; circulars and memoranda.

Records of the Association of Welsh Local Authorities, 1928-1976, including minutes of annual meetings, 1952-1973; minutes of council meetings, 1952-1973; cash books, 1958-1973; administration papers, 1953-1976, papers relating to the withdrawal of railway services in Wales, 1962-1970; and subject files, 1952-1974, relating the interests and activities of the Association, such as water resources, transport, education, and the Welsh economy.

A statement on 'The position of the Teachers in relation to Examinations' for a Central Welsh Board Conference, 1915.

A notebook containing three addresses in Welsh by Philip Thomas entitled 'Braslun o Hanes Caniadaeth Grefyddol yn Nghymru' (f. 1-9 verso), 'Y dull goreu o gyfranu addysg i blant' (ff. 10-14 verso), and 'Holi' (ff. 15-21), delivered to Cymanfa Gerddorol Methodistiaid Dosparth Castellnedd, Good Friday, 1891, Cyfarfod Daufisol Ysgolion Sabbothol Methodistiaid Castellnedd at Fforest, Aberdulais, January 1891, and Cyfarfod Daufisol Castellnedd at Bethlehem Green, 7 May 1893, respectively; and 'The Laws of Questioning', notes taken from a work by Dr Vincent (ff. 22-24 verso).

Addresses by Philip Thomas entitled 'Beth fedr yr Ysgol Sabbothol ddysgu oddiwrth yr Ysgol ddyddiol?' and 'Y dull goreu o gyfranu addysg i blant'.

Press cuttings relating to Wales and Welsh culture, such as religion, politics, literature, music, education, St. David's Day celebrations and the Eisteddfod Genedlaethol, individuals, and the National Library of Wales [1895]-[1939].

Records of the National Curriculum History Committee for Wales, 1978-1995, including papers relating to the establishment and subsequent meetings of the National Curriculum History Committee for Wales, 1989-90; minutes, agenda, reports and articles for discussion at various meetings of the National Curriculum History Working Group, 1989, the History Development Group, 1990, The Historical Association, 1986-89, and the Association of History Teachers in Wales, 1988-9; copies of a WJEC report and examination papers, 1986-93; papers relating to assessment by the School Examinations and Assessment Council, 1989; correspondence from MPs and others, 1988-91; miscellaneous articles, reports, press cuttings and papers relating to teachers' conferences, 1978-93; and printed material on the teaching of history in Welsh schools, 1979-95.

An extract from the minutes of the Council of the University College of Wales, 30 June 1870, relating to an interview between Henry Richard and W. E. Gladstone on the subject of an Exchequer grant to the College (item 1); and a draft (or copy) of a letter, 4 July 1883, from Henry Richard (item 2) and of a statement on intermediate education in Wales, signed by nearly all the members of Parliament for Welsh constituencies, to be sent to Mr Gladstone (item 3).

Papurau T. Ll. Stephens, 1928-1959, yn cynnwys yn bennaf cyfansoddiadau llenyddol, a hefyd papurau'n ymwneud ag addysg, addysg ddwyieithog a Dewi Emrys, ynghyd a grŵp bach o lythyrau a phapurau eraill Dewi Emrys,1940-1953 = Papers of T. Ll. Stephens, 1928-1959, mainly comprising his literary compositions, and also including papers relating to education, bilingual education and Dewi Emrys, together with a small group of letters and other papers, 1940-1953, of Dewi Emrys.

Papers of Victor Hampson-Jones, 1881-1975, comprising lectures and speeches, 1966-1973, teaching notes, radio scripts, 1966-1975, material relating to lawsuits and tribunals involving trades union members, 1960-1975, material relating to Undeb Cenedlaethol Athrawon Cymru, 1953-1972, and personal and family papers, 1881-1973.

Records accumulated by Dr John Herbert, 1968-1984, comprising Welsh Secondary Schools Association records, minutes and papers, 1968-1984; and Headmasters' Association and Secondary Heads Association minutes, correspondence, discussion papers and related material, 1969-1984.

Papers of Tom Owen, HMI, of Aberystwyth, Cardiganshire, 1898-1966, mainly relating to his career in education, including inspector's reports on schools in Montgomeryshire, 1946-1950; reports on St. David's College, Lampeter, Cardiganshire, 1907-1945; and personal papers, 1898-1966.

Papers of Trevor Lovett, 1943-1980, relating mainly to secondary education, including personal papers 1944-1970; papers relating to Holyhead County Secondary School, 1949-1971; papers relating to secondary education in Anglesey, 1959-1980; press cuttings relating mainly to comprehensive education, 1945-1975; together with other papers relating to comprehensive education in England and Wales, 1962-1976, and miscellaneous papers, 1943-1969.

Papurau'n ymwneud â Rhieni dros Addysg Gymraeg, 1963-1988, yn cynnwys copïau o gofnodion, 1963-1988, y Cyfarfodydd Cyffredinol Blynyddol a chofnodion y Pwyllgor Gwaith; adroddiadau blynyddol, 1984-1988; copi o gyfansoddiad y grŵp a luniwyd yn 1983; gwahanol adroddiadau a baratowyd gan y grŵp, 1983-1988; ac adroddiadau a baratowyd gan bwyllgorau sir y mudiad, 1981-1987. = Papers relating to Rhieni dros Addysg Gymraeg1963-1988, including copies of minutes, 1963-1988, of the AGMs and the executive committee minutes; annual reports, 1984-1988; a copy of the group's constitution prepared in 1983; various reports prepared by the group, 1983-1988; and reports prepared by the movement's county committees, 1981-1987.

Papurau ychwanegol gan gynnwys papurau'r Gynhadledd Flynyddol, 1983-1987; cyfrol yn cynnwys cyfansoddiad 'Undeb Rhieni Ysgolion Cymraeg', a chofnodion cyfarfodydd, 1963-1982; a papurau Taflen 'Holi ac Ateb'. Nid yw'r papurau hyn wedi eu catalogio eto.

Letters, 1847-1873 and n.d., from Henry Griffiths of Brecon, Liverpool and Bowden, mainly relating to education in Wales and to the proposed Normal School at Brecon. One letter, 1854, contains adjudications in both Welsh and English by Griffiths on essays submitted for competition at an eisteddfod (see also a letter, 1854, relating to the adjudications), while another, 1862, to William Roberts, tutor at Brecon Independent College, relates to Griffiths's application for the Theological Chair at Carmarthen Presbyterian College.
Also included is a letter, 1889, from Samuel Job of Illinois; a letter, 1906, from Hugh Williams ('Hywel Cernyw') at Pontypridd; and a letter, 1928, from Caleb Lewis at Blaina, Monmouthshire. The last two letters relate to the Welsh periodicals of the time.

Press cuttings, typescript and manuscript notes and accounts, correspondence and printed material, 1894-1917, relating mainly to Aberystwyth County School and its headmaster, David Samuel, and to other Welsh county schools and education in Wales.
The material relating to Aberystwyth County School includes details of a court case, July 1903, involving David Samuel and Mary Isabel Guilbert, a pupil at the school. The remaining material includes typescript and manuscript notes and accounts [by C. M. Williams, Carmarthen], 1894-1914, relating to other county schools in Wales; correspondence, 1903-1917, including two telegrams, dated 30 July 1903, to C. M. Williams, a letter, 1903, to David Samuel from R. H. Guilbert and two letters, 1904, to C. M. Williams from J. Austin Jenkins, Cardiff; and a printed copy, dated May 1902, of a Board of Education report on education and school administration in Wales.

Correspondence, papers and reports, 1968-1979, concerning publishing in the Welsh language, including correspondence between the Publishers' Section of the Union of Welsh Publishers and Booksellers, Secretaries of State for Wales and the Welsh Office, the Welsh Books Council, and the Welsh Arts Council regarding grants for publishing Welsh books for adults and schools (items 6, 11, 12, 13); and correspondence, 1968, respecting a memorandum on the Gittins Report on Primary Education in Wales submitted by the WJEC to the Secretary of State for Education and Science, which contained a recommendation that a new publishing unit be set up to print and publish children's books in Welsh (item 1).

Twenty holograph letters addressed largely to David Davies. The writers include S[amuel] Price Davies [son of Sir David Davies], Bickling Vicarage, Bishop Stortford, and London, 1847-1848 (2) (Rhosybedw estate matters, the writer's visit to Frood Vale, the thinning of 'Galt Hugh Shon', personal), Henry Heald, London, 1848 (2) (the production of title-deeds of the Llwyn estate) (together with a copy of a letter from Messrs. Hill & Heald, London, to John Morgan, solicitor, Llandovery, 1848, relating to the same), Henry Jones [of Llwyn], from Abermeurig, undated (2) (money matters, rumours of a discovery in London of a box belonging to an old woman at Cayo and supposed to contain gold), [the Reverend] Richard Jones, Llanyblodwel, etc., 1846-1848 and undated (8) (one addressed to his brother Henry) (the management of the Llwyn estate, Sir David Davies's opinion of the writer, the success of the writer's son, the progress of the Llandovery Institution and its contribution to education in Wales), George Lloyd, Brunant, 1838 (3) (the writer's claim for payment of principal and interest on a bond), J. E. Morgan [niece of Sir David Davies], Berkeley Street [Berkeley Square, London], [1848] and undated (2) (money matters, thanks for a couple of woodcocks, the illness of the writer's cousin), and Josh. Tyler, Grays Inn, 1838 (an opinion on Mr. Lloyd's claim).

The collection comprises John Owen's diaries, 1889-1926; notebooks containing press cuttings, accounts, extracts from the Bible and historical notes; and an address book (box 1); the memoirs of John Owen entitled 'College Friends', letters, 1872-1894, including many letters concerning the tithe rent charge, papers on the 1889 Welsh Intermediate Education Bill (box 2); a catalogue of the books in the library of Bishop John Owen, 1908, speeches, draft speeches and sermons, letters and papers relating to the disestablishment and disendowment of the church in Wales, papers concerning educational matters, 1891-1895 (box 3); letters, 1893-1897, many on religious matters, including issues of church reform, some of family interest, some congratulating John Owen as Bishop of St Davids in 1897 (box 4); an incomplete manuscript, the final printers' copy and the typescript text of 'The Early Life of Bishop Owen' (box 5); letters, 1898-1905, some relating to sermons and prayers following the death of Gladstone, the 1902 Education Bill, church defence, the fire at the Bishop's Palace at Abergwili in 1903, the new Bishop of Llandaff in 1905, and matters of diocesan interest, and there are also papers, 1904-1905, concerning education, Lloyd George and the Western Mail (box 6); letters, 1897-1914, some relating to the proceedings of the Welsh Church Commission, diocesan matters, church defence etc. (box 7); correspondence and papers, 1914-1917, many relating to the disestablishment and disendowment of the Church in Wales, the Welsh Church Act, 1914, and related matters (box 8); letters, 1906-1915, some relating to the role of the church in politics, education, church defence, the Welsh Church Bill etc. (box 9); correspondence and printed material, 1914-1919, concerning disestablishment, the Welsh Church Act, the Postponement Bill and the war, the tithe and disendowment (box 10); letters and papers, 1910-1926, concerning the tithe and the Welsh Church Bill, the Welsh Church Act, the Church Commissioners, matters relating to the diocese of St Davids (box 11); bundles of letters, 1922-1926, relating to church and diocesan matters, disestablishment and finance (box 12); correspondence and papers, 1914-1926, relating to disendowment, the government of the Church in Wales, the constitutions of the Governing Body and the Representative Body of the Church in Wales, drafts, notes and correspondence concerning 'The Later Life of Bishop Owen' (box 13); papers, 1907-1918, concerning Bishop Owen's life and work, including the typescript draft of 'The Early Life of Bishop Owen' (box 14); typescript drafts of 'The early Life of Bishop Owen' (box 15); manuscript texts of 'The Later Life of Bishop Owen', and miscellaneous source materials relating to Bishop Owen's life and work (box 16); papers concerning church matters, 1889-1925, including material relating to the Ecclesiastical Commissioners, the Representative Body of the Church in Wales, the 'Diocesan Board of Finance', the 'Million Pound Fund' appeal, commutation capital, the St Davids Board of Finance etc., together with the correspondence of Miss Eluned Owen, 1954-1965 (box 17); papers relating to voluntary and parochial contributions, 1905-1908, together with an extensive collection of press cuttings (box 18).
Additional papers (boxes 19-21) comprising the letters of Bishop John Owen, his wife Amelia Owen and their family, together with the recollections of their daughter, Gwenonwy Davies, and of her husband the Very Reverend J. T. Davies, Dean of Bangor, were received in August 2017.

Papers, 1889-1988, of Ben G. Jones, including academic notes, 1932-1935; personal letters, 1942-1968; political papers, 1935-1985; correspondence relating to politics in Merionethshire, 1963-1967; press cuttings, 1958-1963, printed material relating to the four main political parties in Wales, 1949-1966; papers relating to the Honourable Society of Cymmrodorion, 1939-1988; minute book, 1889-1909, of the London Welsh Mutual Improvement Societies' Union; papers deriving from the compilation and publication of the Dictionary of Welsh Biography, 1953-1986; papers relating to his public life, 1968-1984, including the Kilbrandon Commission, 1936-1969, the BBC, 1968-1978, UCW Aberystwyth, 1968-1985, and the Agricultural Land Tribunal, 1980-1984; minute book, 1889-1909, of the London Welsh Mutual Improvement Societies' Union; and papers relating to the status of the Welsh language and to teaching and broadcasting through the medium of Welsh, 1965-1987.