Mae papurau Glyn M. Ashton a dderbyniwyd yn 1992 yn cynnwys ei bapurau ymchwil, ynghyd â nifer o ysgrifau ac adolygiadau, gweithiau llenyddol, sgriptiau radio, gohebiaeth a deunydd printiedig. -- Mae'r papurau a dderbyniwyd yn 2001 yn cynnwys nodiadau a drafftiau o'i erthyglau a'i ddarlithoedd; copïau o lawysgrifau; drafftiau o'i nofelau a'i ddramâu; gohebiaeth; ynghyd â chofnodion Pwyllgor Eisteddfod y Barri, 1968.

A copy of the first issue of Trysorfa Gwybodaeth, neu Eurgrawn Cymraeg, [?3 March] 1770, each of the four sections separately paginated [1]-8 (ff. 2-5, 10-13, 18-21, 26-29), and copies of the first three sections (the news sheet is missing) from the sixth issue, [?12 May] 1770, each paginated 41-48 (ff. 6-9, 14-17, 22-25).
Also included is a sheet, March 1770, advertising the publication of the fourteenth part of Bibl Cymraeg; Gyd a Sylwiadau ac Esponiadau ar bob Pennod, ed. by Peter Williams (1770, see Libri Walliae 369-372) (f. 1).

Mae'r gyfres yn cynnwys gohebiaeth, nodiadau a phapurau amrywiol, [1930 x 1999], yn ymwneud â'r iaith a llenyddiaeth Gymraeg, a grewyd ac a gasglwyd gan yr Athro J. E. Caerwyn Williams.

Eight notebooks of the Reverend D. Silvan Evans containing notes on Welsh grammar, language and literature.

Papurau Cymdeithas Lyfrau Ceredigion,1951-1993, yn cynnwys gohebiaeth, adroddiadau, copïau llawysgrif a theipysgrif, proflenni a phapurau eraill yn ymwneud â chyhoeddiadau penodol, 1954-1991; papurau gweinyddol yn cynnwys gohebiaeth, cofnodion ac agendâu, adroddiadau blynyddol a ffigurau gwerthiant, 1951-1993; gohebiaeth gyffredinol gyda sefydliadau eraill, 1951-1993; ffeiliau yn ymwneud â Welsh Teldisc,1951-1992; a chofnodion ariannol, 1954-1991 = Papers of Cymdeithas Lyfrau Ceredigion, 1951-1993, including correspondence, reports, manuscript and typescript copies, proofs and other papers relating to specific publications, 1954-1991; administrative papers including correspondence, minutes and agendas, annual reports and sales figures, 1951-1993; general correspondence with other organisations, 1951-1993; files relating to Welsh Teldisc, 1951-1992; and financial records, 1954-1991.

Papurau ychwanegol yn perthyn i'r gymdeithas, gan gynnwys papurau gweinyddol, cofnodion cyfarfodydd, papurau ariannol, gohebiaeth a phapurau eraill.

Press cuttings relating to Wales and Welsh culture, such as religion, politics, literature, music, education, St. David's Day celebrations and the Eisteddfod Genedlaethol, individuals, and the National Library of Wales [1895]-[1939].

Cyhoeddiadau a phapurau ymchwil G. J. Williams, [1911x1963], ar lenyddiaeth Gymraeg, gan gynnwys deunydd perthynol i'r cyhoeddiad Gramadegau'r Penceirddiaid; nifer o ddarlithoedd ac erthyglau; ynghyd ag adysgrifau o lawysgrifau o wahanol ffynonellau a nodiadau amrywiol.

Torion papur, [1920x1963], yn ymwneud â Iolo Morganwg, llenyddiaeth Gymraeg, crefydd, diwylliant ac addysg yng Nghymru. Yn eu plith ceir un bwndel o dorion, 1954-1956, o ysgrifau 'Cartrefi Cymru' gan Bob Owen, Croesor, yn Y Cymro.

Miscellaneous notes and papers of Iolo Morganwg, [18 cent., last ¼]-[1830s], on a variety of subjects, including (mainly Welsh) history (E8/1), religion (E8/2), Welsh and English literature, including Dr Johnson (E8/3), Bardism (E8/4) and biography and genealogy (E8/5); together with further bundles of miscellaneous notes and papers, retained in original order (E8/6-9), with subjects including politics, printing and Poems Lyric and Pastoral, 1784-[c. 1809] (E8/6), patriarchal religion, priestcraft and Lewis Morris (E8/7), poetry and monumental inscriptions (E8/8) and salmau (E8/9); and a case containing notes on Welsh manuscripts in the British Museum and at Jesus College, Oxford (E8/10).

Drafts and notes in the hand of Taliesin Williams for the volume Iolo Manuscripts, A Selection of Ancient Welsh Manuscripts, in prose and verse, from the collection made by the late Edward Williams, Iolo Morganwg,… with English translations and notes by his son, the late Taliesin Williams (Ab Iolo) of Merthyr Tydfil (Liverpool: Welsh MSS Society, 1848).
Included are manuscript drafts of the Welsh texts on pp. 3-328 passim (T4/1), drafts of the English translations on pp. 341-496 passim (T4/2), drafts for the footnotes on pp. 332-489 passim (T4/3), a draft of pp. 331-507 passim combining text and footnotes (T4/4), and notebooks containing notes and memoranda relating to the volume (T4/5-11). Also included is a bundle of draft texts, relating mostly to Welsh saints in a format similar to T4/1 but which were either omitted from the volume or intended for another book on Bonedd y Saint (T4/12).

Notes and references relating to the Arthurian legend, Welsh history and literature, and the Welsh laws.

The legend of St. Kadok, and miscellaneous notes on Welsh grammar and literature.

An account of the early history of Wales and notes on Welsh place-names, literature, etc.

Drafts of articles relating to Welsh literature and history and to Celtic institutions; lists of Welsh words derived from English and of words common to both branches of the Celtic family; and a poem entitled 'Rhiangerdd Gwenfalwy o Gastell Caerphili' by 'Idwal Trefor', 1874.

Drafts of articles and reviews relating to Welsh grammar, literature, etc.

A Latin vocabulary, notes for the study of the Mabinogion, extracts from printed sources, notes on 'Y Gogynfeirdd' and their vocabulary, etc.

Papers relating to the work of 'The Free Church Commission promoted by the National Council of Evangelical Free Churches', 1913-1914; notes entitled 'Nonconformists and Welsh Literature' and 'Adgofion am Genhadwyr'; etc.

Two volumes of miscellaneous transcripts mainly in the hand of Walter Davies (Gwallter Mechain, 1761-1849), relating to the antiquities, history, topography, language, and literature of Wales. They include catalogues of Welsh manuscripts; transcripts of manuscripts of Evan Evans (Ieuan Brydydd Hir), of letters of Edward Lhuyd, Lewis Morris, Goronwy Owen, etc., of Strata Marcella abbey charters, of monumental inscriptions, of Evan Evans's transcripts of Richard Farrington's archaeological notes, etc.; notes on Llanerfyl, Llangadfan, and Garthbeibio, written by William Jones, Llangadfan, and sent by him, with letters, to Walter Davies; a letter, 1792, from Edward Williams (Iolo Morganwg) to Walter Davies; an extract, by Lewis Morris, from his Celtic Remains; Marwnad Lewis Morys ... by Goronwy Owen, in the autograph of Evan Evans; etc. Both volumes are indexed.

Miscellaneous notes and extracts made by Walter Davies and dealing with the language, literature, and agriculture of Wales.

Three volumes of miscellaneous notes and fragments relating to Welsh literature, history, archaeology, etc.