Manuscript collections containing original and transcribed poetry and prose, 1543-[20th century]; religious works, 1611-1914; biographies, chronicles, archaeological and historical notes, works on travel, folklore, recipes, grammars, vocabularies and philological notes, 1673-1900; rent-rolls, parish registers, tithe account books, bidding books, minute books and registers of various societies, 1608-1863; pedigrees and genealogical notes, [17th century]-1871, commonplace books, [18th century]-1904, volumes of press-cuttings; manuscripts in the hand of J. H. Davies, including transcripts of and indexes to Welsh poetry, bibliographical notes, literary and legal extracts, pedigrees, biographical data and notes on place-names, 1891-1923; autograph letters from prominent Welsh literary figures, 1674-1921; autograph manuscripts of John Jones, Gellilyfdy, Dafydd Ellis of Criccieth, Eben Fardd (including diaries, 1836-1859), Peter Williams, D. Silvan Evans, Thomas Richards and Myrddin Fardd.

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.

Gohebiaeth a phapurau eraill yn ymwneud â Llyfrau'r Dryw/Cristopher Davies (Cyhoeddwyr) Cyf, Landybïe, 1938-1972, yn cynnwys llythyrau at, ac oddi wrth lawer o lenorion pennaf Cymru; gohebiaeth yn ymwneud ag amrywiaeth o bynciau a sefydliadau gan gynnwys y diwydiant cyhoeddi, yr Eisteddfod Genedlaethol, y Blaid Ryddfrydol, y Swyddfa Gymreig, Prifysgol Cymru, y BBC a HTV, Urdd Gobaith Cymru, Cronfa Trychineb Aberfan a Banc Brenhinol Cymru, 1943-1999; papurau cyfreithiol, 1964-1972; memoranda a chylchlythyrau, 1941-1986; a ffeiliau amrywiol yn cynnwys papurau personol, darlithoedd, torion papur newydd, ffotograffau a deunydd printiedig,1938-1987 = Correspondence and other papers concerning Llyfrau'r Dryw/Christopher Davies (Publishers) Ltd, Llandybïe, 1938-1972, including letters to and from many significant Welsh literary figures; correspondence concerning a variety of subjects and institutions including the publishing industry, the National Eisteddfod, the Liberal Party, the Welsh Office, the University of Wales, the BBC and HTV, Urdd Gobaith Cymru, the Aberfan Disaster Fund and the Royal Bank of Wales, 1943-1999; legal papers, 1964-1972; memoranda and circulars, 1941-1986; and miscellaneous files including personal papers, lectures, newspaper cuttings, photographs and printed matter, 1938-1987.