Papurau Llywelyn Phillips,1864-1982, yn cynnwys gohebiaeth, 1937-1981; erthyglau, darlithoedd, anerchiadau a chyfansoddiadau llenyddol,1933-1980; papurau amrywiol yn ymwneud â'i yrfa, pynciau amaethyddol, bywyd a llenyddiaeth Cymru, 1864-1952; llyfrau lloffion o dorion,1949-1956; cerddi, gan gynnwys y rhai a gyflwynodd i eisteddfodau a chyfansoddiadau ar gyfer achlysuron arbennig, 1957-1981; erthyglau amrywiol a sgriptiau radio,1940-1981; teyrngedau i Llywelyn Phillips,1864-1982; a gweithiau printiedig,1954-1981 = Papers of Llywelyn Phillips, 1864-1982, including correspondence, 1937-1981; articles, lectures, addresses and literary compositions, 1933-1980; miscellaneous papers relating to his career, agricultural matters, Welsh life and literature, 1864-1952; scrap books of cuttings, 1949-1956; poems, including those submitted for eisteddfodau and compositions for special occasions, 1957-1981; miscellaneous articles and radio scripts, 1940-1981; tributes to Llywelyn Phillips, 1981-1982; and printed works, 1954-1981.

Papurau Pennar Davies, 1913-1999, yn cynnwys copïau teipysgrif o'i weithiau llenyddol, ynghyd â phapurau academaidd a phapurau llenyddol.

Papurau Robert Williams Parry, 1873-1971, gan gynnwys llawysgrifau, copïau teipysgrif a phrintiedig o gerddi Robert Williams Parry (yn bennaf rhai cyhoeddedig, gyda pheth amrywiadau), [1900]-[1956]; cyfieithiadau o'i gerddi,1941-1942; cerddi gan bobl eraill a anfonwyd at RWP, 1943-1956; erthyglau gan RWP ar feirdd a barddoniaeth,1911-1933; cyfieithiadau RWP o ddramâu Saesneg, [20fed ganrif]; sgriptiau radio gan RWP, 1941-1953, a sgriptiau radio rhaglenni ar RWP, 1956; erthyglau RWP i gylchgronau, 1918-1957; erthyglau ar RWP a'i waith, 1925-1959; llyfrau nodiadau yn cynnwys nodiadau RWP ar lenyddiaeth Gymraeg a'r ieithoedd Celtaidd, [20fed ganrif]; llythyrau at RWP, 1908-1954; llythyrau yn llongyfarch RWP, 1910-1953; copïau o lythyrau RWP at Aneirin Talfan Davies, 1937-1949 llythyrau RWP at Myfanwy Williams Parry, 1935-1953; llythyrau eraill a phapurau Myfanwy Williams Parry, 1953-1971; llythyrau'n cydymdeimlo â Myfanwy Williams Parry, 1956; llythyrau at J. Maldwyn Davies, 1971-1975; cardiau post, cardiau Nadolig a chardiau coffa, [20fed ganrif]; dyddiaduron poced RWP a Myfanwy Williams Parry, 1923-1969; tystysgrifau geni, priodi a marw a chopi o ewyllys RWP, 1884-1956; adroddiadau ysgol, tystysgrifau a cheisiadau am swyddi, 1896-1914; copïau o bapurau arholiad, 1938-1944; torion papur newydd yn ymwneud ag RWP, 1907-1971; taflenni apêl Cofeb R. Williams Parry, 1956-1971; llyfrau printiedig, 1890-1969; a phapurau amrywiol, 1873-1969. = Papers of Robert Williams Parry, 1873-1971, comprising manuscripts, typescripts and printed copies of poems by Robert Williams Parry (mainly published, with some variations), [1900]-[1956]; translations of his poems, 1941-1942; poems by others addressed to RWP, 1943-1956; articles by RWP on poets and poetry, 1911-1933; translations by RWP of English plays, [20th century]; radio scripts by RWP, 1941-1953, and radio scripts of programmes about RWP, 1956; magazine articles by RWP, 1918-1957; articles on RWP and his work, 1925-1959; notebooks containing notes by RWP on Welsh literature and Celtic languages, [20th century]; lecture notes of RWP on Welsh literature and individual poets, [20th century]; letters to RWP, 1908-1954; letters of congratulation to RWP, 1910-1953; copies of letters from RWP to Aneirin Talfan Davies, 1937-1949; letters of RWP to Myfanwy Williams Parry, 1935-1953; other letters to papers of Myfanwy Williams Parry, 1953-1971; letters of condolence to Myfanwy Williams Parry, 1956; letters to J. Maldwyn Davies, 1971-1975; postcards, Chritsmas cards and memorial cards, [20th century]; pocket diaries of RWP and Myfanwy Williams Parry, 1923-1969; birth, marriage and death certificates and copy of RWP's will, 1884-1956; school reports, certificates and job applications, 1896-1914; copies of examination papers, 1938-1944; newspaper cuttings relating to RWP, 1907-1971; pamphlets of the Cofeb R. Williams Parry appeal, 1956-1971; printed books, 1890-1969; and miscellaneous papers, 1873-1969.

Papurau Berllanydd, [1929]-1984, yn cynnwys dyddiaduron, 1929-1933,1935-1970, 1982-1984, papurau personol yn cynnwys copïau o'i ewyllys,1981,nodiadau ar gyfer pregethau, anerchiadau crefyddol a gwaith bugeiliol, barddoniaeth a deunydd eisteddfodol, torion papur newydd a deunydd printiedig. = Papers of Berllanydd, [1929]-1984, comprising diaries, 1929-1933, 1935-1970, 1982-1984, personal papers including copies of his will, 1981, notes for sermons, religious addresses and pastoral work, poetry and eisteddfod material, newspaper cuttings and printed material.

Papurau W. J. Gruffydd,[1903]-[1952], yn cynnwys drafftiau o erthyglau'n ymwneud â'r Mabinogi; nodiadau darlith ar gyfer ei gyrsiau Cymraeg yng Ngholeg Prifysgol Cymru, Caerdydd; nodiadau darlithoedd ac erthyglau eraill; sgyrsiau a darlledwyd gan y BBC; personalia; a grŵp sylweddol o ohebiaeth oddi wrth ffigurau llenyddol blaenllaw = Papers of W. J. Gruffydd, [1903]-[1952], including drafts of articles relating to the Mabinogi; lecture notes for his Welsh courses at University College of Wales, Cardiff; other lecture notes and articles; BBC broadcast talks; personalia; and a substantial group of correspondence from notable literary figures.

Rhestri, gohebiaeth etc.; yn ymwneud ag aelodaeth, 1976-1979,1983-1987; gohebiaeth yn ymwneud â Barddas a chyhoeddiadau Barddas,1976-1986; gohebiaeth gyffredinol,1976-1978; a chylchlythyrau, adroddiadau a ffurflenni glân 1976-1978 = Lists, correspondence, etc., relating to membership, 1976-1979, 1983-1987; correspondence relating to Barddas and Barddas publications, 1976-1986; general correspondence, 1976-1978; and circulars, reports and unused forms, 1976-1978.

Papurau Gerallt Jones,1902-1981, yn cynnwys yn bennaf copïau llawysgrif a theipysgrif o'i farddoniaeth a'i rhyddiaith,1937-1981, llawer ohonynt wedi'u cyflwyno i gystadlaethau yn y Genedlaethol ac eisteddfodau eraill, ynghyd â'i ohebiaeth,1952-1982, a hefyd deunydd yn ymwneud â theulu llenyddol 'Y Cilie', yn cynnwys barddoniaeth a rhyddiaith gan y Parch. Fred Jones,1902-1932, y Parch. Simon B. Jones, 1934-1955, ac aelodau eraill o'r teulu, yn ogystal â llythyrau a chardiau,1956-1970, oddi wrth Dafydd Isfoel Jones a Jac Alun Jones = Papers of Gerallt Jones, 1902-1981, consisting mainly of manuscript and typescript copies of his poetry and prose, 1937-1981, much of which was entered for competition at National and other eisteddfodau, together with his correspondence, 1952-1982, and also material relating to the literary family of 'Y Cilie', including poetry and prose by the Rev. Fred Jones, 1902-1932, the Rev. Simon B. Jones, 1934-1955, and other members of the family, as well as letters and cards, 1956-1970, from Dafydd Isfoel Jones and Jac Alun Jones.

Papurau, 1925-1985, y Parch. John Roberts, Llanfwrog, yn cynnwys llythyrau, yn bennaf at y Parch. a Mrs John Roberts, 1928-1985, y gohebwyr yn cynnwys R. Williams Parry, 1946-1953; cerddi llawysgrif, teipysgrif a phrintiedig, [1930]-1984; carolau ac emynau, 1962-1968; traethodau, darlithoedd ac anerchiadau crefyddol, 1949-1977, a gyflwynwyd mewn cystadlaethau eisteddfodol; darlithoedd, anerchiadau a nodiadau ar lenyddiaeth Gymraeg a phynciau crefyddol, 1957-1987; pregethau, [1929]-1979; sgriptiau radio ar gyfer gwasanaethau crefyddol, 1943-1978; sgetsys, dramâu byrion a rhaglenni nodwedd, 1964-1979; llyfrau nodiadau, 1932-1978; deunydd yn ymwneud ag R. Williams Parry, 1925-1969; a deunydd hanesyddol yn ymwneud â Chapel Moriah, Caernarfon, 1812-1979, Capel Tegid, Y Bala, 1885-1968, a Chapel y Garth, Porthmadog, 1945-1949. = Papers, 1925-1985, of the Rev. John Roberts, Llanfwrog, including: letters, mostly to Rev. and Mrs John Roberts, 1928-1985, the correspondents including R. Williams Parry, 1946-1953; manuscript, typescript and printed poems, [1930]-1984; carols and hymns, 1962-1968; essays, lectures and religious addresses, 1949-1977, entered for eisteddfod competitions; lectures, addresses and notes on Welsh literature and religious subjects, 1957-1987; sermons, [1929]-1979; radio scripts for religious services, 1943-1978; sketches, short dramas and feature programmes, 1964-1979; notebooks, 1932-1978; material relating to R. Williams Parry, 1925-1969; and historical material relating to Capel Moriah, Caernarfon, 1812-1976, Capel Tegid, Y Bala, 1885-1968, and Capel y Garth, Porthmadog, 1945-1949.

Papurau Pelidros yn cynnwys barddoniaeth, drafftiau cerddi, libreto a thorion papur newydd o'i farddoniaeth cyhoeddedig,1903-1933; rhyddiaith, yn cynnwys dramâu, dadleuon, bywgraffiadau, darlithoedd, traethodau ac anerchiadau,1904-1932; llawysgrifau, nodiadau a thorion papur newydd o'i bregethau, 1906-1938; llythyrau ato ef a'i deulu, 1878-1928; dyddiaduron,1906-1958; a phapurau personol a theuluol, 1904-1958 = Papers of Pelidros comprising poetry, drafts of poems, libretto and newspaper cuttings of published poetry, 1903-1933; prose, comprising dramas, debates, biographies, lectures, essays and addresses, 1904-1932; manuscripts, notes and newspaper cuttings of sermons by him, 1906-1938; letters to him and his family, 1878-1928; diaries, 1906-1958; and personal and family papers, 1904-1958.

Papurau'r Parch. William Rhys Watkin, yn cynnwys nodiadau pregethau a phapurau eraill,1899-1936; gohebiaeth, 1878-1948, blwyddlyfrau printiedig Undeb Bedyddwyr Cymru yn cynnwys cofnodion gan WRW, 1891-1945; nodiadau ymchwil ac erthyglau ar Bedo Brwynllys, y Parch. E. T. Jones, a hanes y Bedyddwyr, 1909-[1945], a llyfr nodiadau Pwyllgor yr Eisteddfod Genedlaethol, Llanelli,1928-1931; a chofnodion a gasglwyd ganddo, gan gynnwys cofnodion a chyfrifon eglwysi'r Bedyddwyr yn sir Gaerfyrddin a Morgannwg, 1843-930; nodiadau pregethau a phapurau eraill Richard Davies ('Yr Hen Belican'),1816-1873; papurau a llyfrau nodiadau amrywiol yn ymwneud â'r Bedyddwyr Cymraeg, 1787-1896; a phapurau Thomas Jones, morwr, o Aberdaugleddau, sir Benfro, 1845-1900 = Papers of Rev. William Rhys Watkin, including sermon notes and other papers, 1899-1936; correspondence, 1878-1948, printed Baptist Union of Wales yearbooks containing entries by WRW, 1891-1945; research notes and articles on Bedo Brwynllys, the Rev. E. T. Jones, and Baptist history, 1909-[1945], and notebook of the National Eisteddfod Committee, Llanelli, 1928-1931; and records collected by him, including minutes and accounts of the Welsh Baptist Church, Eldon Street, Moorfields, London, 1846-1905; records of Baptist churches in Carmarthenshire and Glamorgan, 1843-1930; sermon notes and other papers of Richard Davies ('Yr Hen Belican'), 1816-1873; miscellaneous papers and notebooks relating to Welsh Baptists, 1787-1896; and papers of Thomas Jones, mariner, of Milford Haven, Pembrokeshire, 1845-1900.