Papurau Wil Ifan, 1896-1982, yn cynnwys llythyrau ato, 1902-1966, ac oddi wrtho at ei deulu, 1915-1966; gweithiau cyhoeddedig a barddoniaeth a rhyddiaith, yn Saesneg yn bennaf, yn cynnwys nodiadau, [1920]-1956; pregethau, 1921-1933; dyddiaduron, 1900-1947; sgriptiau radio, 1952-1963; a chopïau o Celt a olygwyd gan Dan Evans, 1896-1897. = Papers of Wil Ifan, 1896-1982, including letters to him, 1902-1966, and from him to his family, 1915-1966; published works and poetry and prose, mainly in English, including notes, [1920]-1956; sermons, 1921-1933; diaries, 1900-1947; radio scripts, 1952-1963; and copies of Celt, edited by Dan Evans, 1896-1897.

Hefyd yn cynnwys astudiaeth Shirley Wynne Vinall, 2019, wedi ei argraffu a’i rwymo yn ddwy gyfrol, o 'Llyfr yr Achau' gan 'Wil Ifan', yn cynnwys detholiadau o lyfr nodiadau ei thaid ar hanes ei deulu, gwybodaeth am deuluoedd ei fam a’i dad yn Sir Gaerfyrddin, Cwmafan a Sir Aberteifi, a theulu ei wraig Nesta Wyn Edwards, Dolgellau, ynghyd â phennod ychwanegol gan y rhoddwr ar ei yrfa a’i ysgrifau. Ceir hefyd gopi llawysgrif o’r emyn "O Jesu, King most wonderful", a gyfieithwyd gan y Parch. E. Caswall, gyda cherddoriaeth gan B[ertram] J. Orsman, 1946, wedi’i lofnodi a’i gyflwyno gan y cyfansoddwr i’r Parch. W. Evans ('Wil Ifan'). = Also includes a study by Shirley Wynne Vinall, 2019, printed and bound in two volumes, of 'Llyfr yr Achau' by 'Wil Ifan', including extracts from her grandfather’s notebook on his family history, and containing information about his maternal and paternal families in Carmarthenshire, Cwmavon and Cardiganshire, and the family of his wife Nesta Wyn Edwards, Dolgellau, together with an additional chapter by the donor on his career and writings. Also included is a manuscript copy of the hymn "O Jesu, King most wonderful", translated by Rev. E. Caswall, with music by B[ertram] J. Orsman, 1946, signed and presented by the composer to the Rev. W. Evans ('Wil Ifan').

Papurau a roddwyd Hydref 2022: gweler y disgrifiad dan y Gyfres ychwanegol.

Deunydd bywgraffyddol yn ymwneud â Winnie Parry, 1953-1960; gohebiaeth,1893-1949, gan gynnwys llythyrau oddi wrth O. M. Edwards, 1893-1915, a J. Glyn Davies, 1895-1897; llythyrau ynglŷn â'r Eisteddfod Genedlaethol, 1911-1932; llyfrau nodiadau, yn cynnwys drafftiau o'i chyfansoddiadau cynnar, 1894-1912; copi teipysgrif o 'Catrin Prisiard', 1896; storïau byrion a barddoniaeth a gyhoeddwyd yn Cymru, 1893-1910; storïau byrion eraill,1897; ysgrifau Saesneg, 1901-1907; copïau o Cymru'r Plant yn cynnwys ei gwaith, 1893-1947; torion papur newydd, 1908-1942; deunydd printiedig, 1818-1920; papurau, rai llenyddol yn bennaf, yn ymwneud â Margaret Parry, 1861-1875, a John Roberts, 1876-1903. = Biographical material relating to Winnie Parry, 1953-1960; correspondence, 1893-1949, including letters from O. M. Edwards, 1893-1915, and J. Glyn Davies, 1895-1897; letters concerning the National Eisteddfod, 1911-1932; notebooks, including drafts of early compositions, 1894-1912; typescript of 'Catrin Prisiard', 1896; short stories and poetry published in Cymru, 1893-1910; other short stories, 1897; English compositions, 1901-1907; copies of Cymru'r Plant containing her works, 1893-1947; newspaper cuttings, 1908-1942; printed material, 1818-1920; papers, mainly literary, relating to Margaret Parry, 1861-1875, and John Roberts, 1876-1903.

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.

Original manuscripts and typescripts of editorial notes, articles, poems, and reviews published in Y Llenor during the period 1925-1927.

Holograph copies of articles, etc., by T[homas] Gwynn Jones [professor of Welsh Literature, University College of Wales, Aberystwyth], published in Y Darian, 1919-1926, including a series of articles entitled 'Iwerddon' (18, 25 Medi, 2, 9, 16 Hydref 1919, subsequently published as a booklet (50 pp.) under the same title, Aberdar, 1919); a series of articles entitled 'I Leddfu Gofid' (26 Mai, 9, 16, 23, 30 Mehefin, 7 Gorffennaf 1921, subsequently published as a booklet (63 pp.) under the title Peth Nas Lleddir, Aberdar, 1921); an essay entitled 'Colofnau Mwg' ( 16 Rhagfyr 1926, subsequently published in the author's Beirniadaeth a Myfyrdod, Wrecsam, 1935, pp.119-27); reviews of Saunders Lewis: A School of Welsh Augustans, Wrexham, 1924 (29 Mai 1924), and of Kate Roberts: O Gors y Bryniau. Naw Stori Fer, Wrecsam, 1925 (7 Mai 1925); a letter headed 'Tafodiaith', in reply to a correspondent's observations in Y Darian, 4 Mehefin 1925, on comments by T. Gwynn Jones in his review of O Gors y Bryniau (see above) on the author's use of dialect (11 Mehefin 1925); and adjudications on 'englynion' submitted in a literary competition organised by Y Darian (28 Rhagfyr 1922), on the 'rhieingerddi' and 'myfyrdraethau' submitted for competition at the National Eisteddfod of Wales, 1923 (16 Awst 1923; for the adjudication on the 'rhieingerddi', see also Cofnodion a Chyfansoddiadau Eisteddfod Genedlaethol 1923 . . . Barddoniaeth a Beirniadaethau, pp.95-6), on the chair poems and 'englynion' submitted at the Cardiff and District Welsh Societies Eisteddfod, 1925 (2, 9 Ebrill 1925), and on the short stories submitted in a competition organised by Y Darian, 1925 (26 Tachwedd 1925). Most of these items are listed in A Bibliography of Thomas Gwynn Jones. Reprinted from The Bibliography of Denbighshire, Part 3, Wrexham, 1938. See also the supplement to this work, published in Denbighshire Historical Society Transactions, vol. 5, 1956, pp. 131-49.

Some thirty letters, 1925-1940, from the Dutch scholar Theodor Max Chotzen to Dr E. D. Jones. Written mainly in Welsh, they contain personal news, details of the writer's publications, references to contemporary Welsh scholars, and observations on political events in Wales. Also included is a letter, 1946, from his widow containing information concerning her husband's imprisonment by the Germans and subsequent death on 27 February 1945.

Over seventy letters and cards, 1917-1986, of miscellaneous provenance from twentieth-century Welsh writers to various recipients; the correspondents include E. Tegla Davies (1) 1956, W. J. Gruffydd (1) 1952, R. T. Jenkins (1), 1946, David James Jones (Gwenallt) (1) 1953, T. Gwynn Jones (9) 1923-1939, J. Saunders Lewis (5) 1931-1976, Caradog Prichard (4) 1962-1972, Kate Roberts (28) 1937-1983, D. J. Williams (6) 1917-1969, and T. H. Parry-Williams (1) 1953.