Papurau Aelwyd yr Urdd, Aberystwyth, 1928-1991: cofnodion y cyfarfod cyffredinol blynyddol, y pwyllgor cyffredinol a phwyllgorau eraill, 1928-1990; cofnodion, gohebiaeth a phapurau eraill,1968-1991; a chyfrol o dorion o'r wasg a rhaglenni, 1954-1964 = Papers of Aelwyd yr Urdd, Aberystwyth, 1928-1991: minutes of the annual general meeting, general committee and other committees, 1928-1989; membership books of officials and committee members, 1933-1990; minutes, correspondence and other papers, 1968-1991; and volume of newspaper cuttings and programmes, 1954-1964.

Records of the Aberystwyth Peace Network, 1979-1991, including records relating to the Campaign Against the Arms Trade, 1977-1985; correspondence and records concerning Greenham Common Peace Camp, 1982-1984; and records relating to Greenpeace, 1984-1985.

A further group of papers comprising printed copies of minutes of meetings of the Aberystwyth Peace and Justice Network, 2003-2005, and also minutes of meetings 2006 and 2007 of the Aberystwyth Peace and Justice Network were received. These remain uncatalogued.

Miscellanea of David Samuel, including articles, notes on the centenary of the introduction of the printing press to Aberystwyth and other notes of local interest, an appreciation of Sir Owen M. Edwards, etc., together with an account of the formation of a branch of 'Undeb y Ddraig Goch' at Aberystwyth, 1902.

Articles, addresses, notes and press cuttings by David Samuel relating to Aberystwyth, D. Silvan Evans, etc., 1887-1895.

The 1976 group comprises autobiographical data, reminiscences and impressions of Aberystwyth, 1900-1904, recollections of Welsh colleagues, correspondence, 1951-1967, notes and working papers, 1904-1910, notes and drawings for lectures, 1906-1907, copies of addresses, slides, maps, and ordnance survey charts of Aberystwyth, 1905 and 1912; brief manuscript and typescript account of life in the Channel Islands under German occupation during World War II mainly Guernsey, 1944-1954; letters of condolence to Mrs. Fleure; cash books, 1869-1914, which, for the period 1869-89, was kept by Fleure's father; research papers and correspondence relating to the distribution of blood groups in the United Kingdom, with particular reference to Wales. The 1982 group comprises the research notes of Herbert John Fleure, 1966-1967, mainly concerned with the distribution of blood groups in the United Kingdom, with special reference to Wales, comprising notes and drafts for Ada C. Kopc, The Distribution of the Blood Groups in the United Kingdom (London, 1970), lecture notes of Dr. Kopc, 1963-1965, and offprints of articles by Elizabeth S. Brown and I. Morgan Watkin, 1963-1967; correspondence, 1963-1968, mainly from Ada C. Kopc, A.E. Mourant and R.A. Pelham; miscellaneous papers and correspondence on the archaeology of the Channel Islands, Cornwall and Devon, 1963-1965.

Documents, 1818-1941, mostly of late-nineteenth century Cardiganshire interest, which were collected by and recovered from the Cambrian newspaper salvage campaign, 1940-1941, comprising miscellaneous items including tradesmen's and business records, personal diaries and note-books, hymn and music books, rules for Cardiganshire miners, a school attendance book, and the account book of a brig.

Papers of the UMCA, 1978-1994, including membership files, 1979-1986; accounts, 1981-1994; papers of UMCA officers, 1985-1990; and political correspondence, 1978-1987.

The file contains letters to J. E. Powell from Thomas Gee, A. C. Humphreys-Owen, John Eiddon Jones and Harry Reichel; a letter regarding an article written by Thomas Gee (enclosed) and a request by John Humphreys, journalist for the Liverpool Daily Post, 1896, requesting an article in response. It also includes drafts of speeches; invitations to the opening of the new Aberdare Hall, 1895; the installation of H. R. H. Prince of Wales in Aberystwyth, 1896, and the opening of a new building at the Bangor County School for Girls, 1897; a draft of the Intermediate Education Wales Bill; together with a scheme for Intermediate Education Constitution and Powers of Education Commissioners Finance.

Papers of Mrs L. Eirlys Williams, 1905-1978, relating to her work for the Baptist Union of Wales and other Baptist causes, including letters to the Rev. and Mrs E. J. Williams [L. Eirlys Williams], 1949-1964; letters from various correspondents addressed to Mrs M. Christy Davies, secretary of the Welsh Baptist Ministers' and Missionaries' Wives Prayer Union, 1950-1953; Baptist Union of Great Britain and Ireland papers and printed material, 1930-1978; Baptist Union of Wales papers and printed material, including copies of The Inset, 1941-1978; and Baptist Missionary Society papers and printed material, 1905-1974, including English and Welsh copies of Prayer Partners, 1933-1974.

Deeds, 1555-1918, of clients and relating to properties in Cardiganshire, Merionethshire, Montgomeryshire and Radnorshire, including papers of the Penglais estate in the Aberystwyth area, 1555-1918; Aberystwyth borough records, 1759-1813; letters, 1794-1882; papers of John Parry, solicitors, Aberystwyth, including share certificates of the Aberystwyth Gas and Coke Company, 1839; Bwlch Consolidated Lead Mines, 1847; records concerning the Aberystwyth and Tregaron Bank, 1813-1844; miscellaneous papers, [c. 1783]-1932; printed items, [c. 1783]-1867; certificates of shares in the Aberystwyth Public Rooms, 1818-1821, and the Robinson Gold Mining Company, 1903; letters and papers relating to the estate of Roderick Richards, Penglais, [c. 1830]; builders' accounts, 1845; and tithe receipts, 1927-1932.

The section consists of the administrative and financial records, 1975-1988, of the Ceredigion, formerly Mid Wales branch, situated in Aberystwyth.

An album compiled by George Eyre Evans, containing a collection of one hundred and ninety-five autograph letters, manuscript poems and other documents, printed notices, broadsides, circulars, photographs, etc., of Aberystwyth interest. The majority relate to the Aberystwyth Dispensary, later known as the Aberystwyth Infirmary, and particularly to the payment of subscriptions, 1821-1844. Others relate to the erection and renovation of St Michael's Church, 1825-1846; the restoration of the parish church of Llanbadarn Fawr, 1867; the opening of the Public Library, 1906; and the Exhibition of the Centenary of the Introduction of Printing, 1909.
Included in the volume is a typescript schedule of the documents.

An album containing press cuttings, reprints of articles in the Aberystwyth Observer, 1899-1905, posters, etc., mainly relating to Aberystwyth and Cardiganshire, and minutes of the committee of the 'Highgate Men's Club', Whitchurch, Shropshire, founded in 1889, with correspondence and other papers relating to the club.

Papers of the Aberystwyth Corn and General Market Co. covering the whole period of its existence, 1870-1922, including papers relating to the construction of the two market halls. The archive includes minute books; company registers; financial records; deeds and documents; correspondence (mainly relating to the Company's liquidation); and inventories.

The file contains mainly letters addressed to O. M. Edwards, and a small number to their parents or their sister. The majority of the letters were sent from St John's College, Cambridge, where the writer was a student, or from Aberystwyth, where he was a lecturer and subsequently Professor of History. They describe his activities, pursuits and surroundings in some detail. There are also some references to family news and events.

This file of letters, which came to light after the rest of the O. M. Edwards Papers had been catalogued, comprises detailed letters penned by Edwards while a student at the University College of Wales, Aberystwyth. They describe his surroundings, experiences and activities in some detail and give a vivid portrait of a student's life at Aberystwyth in the early 1880s.

The series comprises letters to his cousin Ifan T. Davies, 1885-1887, his associate D. H. Williams, 1911-1919, and various individuals, 1884-1920. These are stray letters with little or no connection between them.

The series comprises a letterbook containing copies of letters written by O.M. Edwards to various members of his family including his parents and brothers. They were all written whilst he was a student at Aberystwyth. Some of the letters are lengthy and describe in detail events at the college and locally at Aberystwyth. They also contain references to Llanuwchllyn and to members of the Edwards family.

The series consists of letters written by Edwards to his brothers Edward and John (the precise recipient is not usually identified) mainly from Aberystwyth and Oxford, together with some letters written from the Continent. The letters describe his experiences and activities, both academic pursuits and leisure interests, in some detail. There are many references to family news and events.

The series contains letters written by O.M. Edwards to his parents Owen and Elizabeth Edwards discussing in some detail his experiences as a student at the University of Wales, Aberystwyth, and at Balliol College, Oxford, his travels on the Continent, and his life as an Oxford don. Many of the letters contain references to events at Llanuwchllyn and to family life.