Pocket notebooks kept between c. 1874 and c. 1901, many undated, containing adjudications by Gwilym Cowlyd on bardic competitions at various eisteddfodau, miscellaneous accounts, minutes of various committees, copies of poems and prose works, and a volume endorsed, 'Cymmrodoriaeth Barddas Glan Geirionydd. Gwilym Cowlyd's Book' and containing copious notes, poems and accounts for the years 1896 until 1901 on 'Arwest Geirionydd'.

An annotated list of 'eisteddfodau' held between 1816 and 1884, with details of the principal subjects set for competition, the names of the winners, etc.

The file consists of papers relating to the National Eisteddfod and in particular to the Eisteddfod's music panel, 1980-1986.

Papers of Sir Evan Vincent Evans, 1880-1933, including correspondence, 1881-1927 (comprising general correspondence to Sir E. Vincent Evans, 1881-1927, letters relating to the Ignatius Williams manuscripts, 1906-1922, drafts and copies of letters from Vincent Evans, 1893-1927, letters addressed to others, 1892-1923; and miscellaneous letters, 1894-1927, mainly those with unrecognisable signatures); bibliography of Welsh printed books, 1701-1807; minutes of the Board of Celtic Studies, 1933; records of the Diphwys Slate Quarry, 1924-1927; papers relating to education in Wales, 1887-1888; the London Committee of the Cardiff Medical Society, 1890; the National Eisteddfod of Wales, 1887-1926; the National Library of Wales, 1924-1927; the National Museum of Wales, c. 1900-1928; the Royal Commission on Ancient Monuments in Wales, 1911-1933; Royal Commission on Public Records, 1914-1916; the Society for the Promotion of Nature Reserves, 1914; the University Board of Celtic Studies, 1922-1927; the University of Wales, c. 1893-1927; the Vincent Evans Testimonial Fund, 1898-1899; and the Welsh Club, 1893-1913; together with copies of speeches and addresses delivered by Vincent Evans; and miscellaneous papers, [c. 1880]-[1930].

Papers of the Rev. William Rees, 1872-[1930s], including a volume of pryddestau and englynion by William Rees successfully submitted for competition at various eisteddfodau, 1872-1910; and a further six volumes of poetry by Rees; a volume of hymns, 1919-1925; two volumes of writings; and a volume containing a pryddest, 1931, by D. Emrys James ('Dewi Emrys').

Papurau'r cymdeithasegydd Alwyn D. Rees, 1911-1974, yn cynnwys papurau'n ymwneud â Phrifysgol Cymru, yn bennaf â Choleg Prifysgol Cymru, Aberystwyth, 1920au-1974, gan gynnwys papurau'n ymwneud â'r comisiwn a sefydlwyd i archwilio strwythur ffederal Prifysgol Cymru yn y 1960au; papurau ynglŷn â lle'r Gymraeg yn y Brifysgol a'r ymgyrch i sefydlu neuadd Gymraeg i fyfyrwyr yn Aberystwyth,1967-1974; papurau'n ymwneud â llyfrau, erthyglau a darlithoedd Alwyn D. Rees, 1933-1973, a Chymdeithas yr Iaith Gymraeg, [c.1964]-1974; papurau'n ymwneud â Barn, 1966-1967; papurau'n ymwneud â darlledu yng Nghymru, 1938-1974; papurau'n ymwneud â'r diwydiant llechi yng Nghymru,1946; papurau'n ymwneud â gwleidyddiaeth yng Nghymru, 1911-1974; gohebiaeth gyffredinol, 1935-1974; a phapurau a gohebiaeth bersonol , 1930-1974 = Papers of the sociologist Alwyn D. Rees, 1911-1974, including papers relating to the University of Wales, mainly the University College of Wales, Aberystwyth, 1930s-1974, including papers relating to the commission established to examine the federal structure of the University of Wales in the 1960s; papers concerning the place of the Welsh language in the University and the campaign to establish a Welsh student hostel at Aberystwyth, 1967-1974; papers relating to the University of Malta, 1940-1951; Alwyn D. Rees's research papers, 1933-1973; papers relating to Alwyn D. Rees's books, articles and lectures, and further related research papers assembled by him, 1925-1974; papers relating to the Welsh language, 1952-1974, and 'Cymdeithas yr Iaith Gymraeg', [c. 1964]-1974; papers relating to 'Barn', 1966-1975; papers relating to broadcasting in Wales, 1938-1974; papers relating to the Welsh slate industry, 1946; papers relating to politics in Wales, 1911-1974; general correspondence, 1935-1974; and personal papers and correspondence, 1930-1974.

Drafftiau darlithoedd ac erthyglau gan G. J. Williams, ynghyd â nodiadau amrwyiol, yn ymwneud yn bennaf â'r Eisteddfod a'r Orsedd.

Papurau William Rees Jones, 1949-1985, yn cynnwys gweithiau rhyddiaith a gyflwynwyd i gystadlaethau mewn gwahanol eisteddfodau cenedlaethol,1949-1985, ac amrywiol draethodau a chyfansoddiadau o'i eiddo, 1966-1978, llawer heb ddyddiad = Papers of William Rees Jones, 1949-1985, comprising prose writings submitted for competitions at various national eisteddfodau, 1949-1985, and other miscellaneous essays and writings by him, 1966-1978, many undated.

Papurau William Leslie Richards o Gapel Isaac, sir Gaerfyrddin, deunydd llenyddol yn bennaf, 1939-1989, yn cynnwys barddoniaeth, 1957-1989; rhyddiaith, 1937-1972, beirniadaethau mewn gwahanol eisteddfodau, 1962-1980; sgriptiau radio, 1951-1963; sgriptiau a baratowyd ar gyfer rhaglenni teledu, 1965-1968; gohebiaeth, 1936-1989; dyddiaduron, 1932-1989; tystysgrifau, 1925-1928; a phapurau amrywiol,1930-1989. = Papers of William Leslie Richards from Capel Isaac, Carmarthenshire, mainly literay material, 1939-1989, including poetry, 1957-1989; prose writings, 1937-1972, adjudications in various eisteddfodau, 1962-1980; radio scripts, 1951-1963; scripts prepared for television programmes, 1965-1968; correspondence, 1936-1989; diaries, 1932-1989; certificates, 1925-1928; and miscellaneous papers, 1930-1989.

Papurau Gwilym Wyn yn cynnwys barddoniaeth a rhyddiaith, beirniadaethau eisteddfodol, traethodau a nodiadau ar gyfer sgyrsiau a phregethau, [1852]-[1914] = Papers of Gwilym Wyn comprising poetry and prose works, eisteddfodic adjudications, essays and notes for talks and sermons, [1852]-[1914].

Papurau, 1838-[1991], yn bennaf papurau personol a theuluol Eunice Bryn Williams, 1838-[1991], yn cynnwys darnau cerddoriaeth yn llaw Eunice Bryn Williams, 1954-[1980au]; nodiadau darlithoedd ar gerddoriaeth, [1940au-1980au]; papurau'n ymwneud â Chymdeithas Alawon Gwerin Cymru a Chymdeithas Cerdd Dant Cymru, [1950au-1980au], ac eisteddfodau, yn arbennig Eisteddfod yr Urdd, [1930au-1980au]; rhaglenni cyngherddau o gerddoriaeth Cymreig, 1939-1961; a gohebiaeth deuluol,1888-1961. = Papers, 1838-[1991], mainly personal and family papers of Eunice Bryn Williams, 1838-[1991], including music pieces in the handwriting of Eunice Bryn Williams, 1954-[1980s]; lecture notes on music, [1940s-1980s]; papers relating to Cymdeithas Alawon Gwerin Cymru and Cymdeithas Cerdd Dant Cymru, [1950s-1980s], and to eisteddfodau, especially Eisteddfod yr Urdd, [1930s-1980s]; concert programmes of Welsh music, 1939-1961; and family correspondence, 1888-1961.

Cofnodion Urdd Gobaith Cymru, yn cynnwys papurau gweinyddol, yn eu plith adroddiadau a gohebiaeth, 1931-1990; cofnodion Pwyllgor, is-bwyllgorau a phaneli yr Urdd, 1939-1995, cofnodion ariannol, 1931-1996l, papurau yn ymwneud â theithiau tramor a drefnwyd gan Urdd Gobaith Cymru a Negeseuon Heddwch ac Ewyllys Da, 1931-1984; cofnodion, dogfennaeth ariannol ac arall perthynol i Gronfa Goffa O.M. Edwards, 1928-1976; papurau yn ymwneud â changhennau (adrannau ac aelwydydd), 1938-1960; gohebiaeth a phapurau yn ymwneud â chyrsiau a drefnwyd gan yr Urdd,1948-1965, a phapurau eraill yn ymwneud â'r cylchgronau, 1948-1990; trefniadau ar gyfer gwahanol wyliau, 1936-1995; cofnodion gweinyddol ac ariannol yn ymwneud â'r gwersylloedd yn Llangrannog a Glanllyn,1940-1995; deunydd printiedig, 1932-1963; llythyrau at O.M. Edwards, 1910-1920; cofnodion yn ymwneud â'r Cyngor, 1972-1991, a Chwmni yr Urdd, 1972-1989; cofnodion yn ymwneud ag aelodau staff, 1975-1995; gohebiaeth a thaflenni yn ymwneud ag Eisteddfod Genedlaethol yr Urdd,1930-1965; papurau yn ymwneud â Maes yr Eisteddfod, 1972-1985, seremonïau yr Eisteddfod, 1952-1982, sioeau'r theatr, 1981-1991, a chystadlaethau; a chofnodion yn ymwneud â threfnu pob un o'r Eisteddfodau Cenedlaethol, 1946-1996 = Records of Urdd Gobaith Cymru, comrpising general administrative papers, including reports and correspondence, 1931-1990; records of Urdd Committee, sub-committees and panels, 1939-1995; financial records, 1931-1996; papers relating to overseas trips organized by Urdd Gobaith Cymru and international meetings, 1931-1962; papers relating to the Messages of Peace and Goodwill, 1931-1984; minutes, financial and other records of the O. M. Edwards Memorial Fund, 1928-1976; papers relating to the Welsh School, Aberystwyth, 1939-1952; papers relating to branches (adrannau and aelwydydd), 1938-1960; correspondence and papers relating to courses organized by the Urdd, 1948-1965; papers relating to the annual conferences to discuss the Urdd's magazines, 1952-1973, and other pars relating to the magazines, 1948-1990; arrangements regarding various festivals, 1936-1995; administrative and financial records relating to the camps at Llangrannog and Glanllyn, 1940-1995; printed material, 1932-1963; letters addressed to O. M. Edwards, 1910-1920; records relating to the Council, 1972-1991, and Cwmni'r Urdd, 1972-1989; records relating to staff members, 1975-1995; correspondence and literature relating to the Urdd National Eisteddfod, 1930-1965; papers relating to the Eisteddfod Maes, 1972-1985, Eisteddfod ceremonies, 1952-1982, theatre shows, 1981-1991, and competitions; and records relating to the organisation of individual National Eisteddfodau, 1946-1996.

Llawysgrifau Evan James a James James, cerddoriaeth a barddoniaeth yn bennaf, 1806-1917, yn cynnwys fersiwn gwreiddiol yr alaw 'Glan Rhondda', y daethpwyd i'w hadnabod yn ddiweddarach fel Hen Wlad fy Nhadau, 1856; barddoniaeth Ieuan ab Iago,1831-1842; dyddiaduron,1806-1827, barddoniaeth, 1837-1849; cyfriflyfrau poced,1836-1837; a beirniadaethau eisteddfodol, 1853-1863. = Manuscripts of Evan James and James James, mainly music and poetry , 1831-1917, including the original version of the tune 'Glan Rhondda', which later became known as Hen Wlad fy Nhadau, 1856; poetry of Ieuan ab Iago, 1831-1842; diaries, 1806-1827, poetry, 1837-1849; pocket account books, 1836-1837; and Eisteddfod adjudications, 1853-1863.