The file comprises correspondence and papers, 1989-1991, relating to the meetings of the Welsh Language Working Party set up by the Labour Party Wales, including agenda, minutes and reports.

An essay entitled 'Traethawd ar y Sefyllfa yr hon a berchenoga y Iaith Gymraeg yn mhlith y Ieithoedd o'r hanniad Celtaidd ...'

A 'waste book' of Ebenezer Thomas ('Eben Fardd') consisting largely of problems in fluxions, together with 'The Welsh' and 'The Welsh Language' (being attacks on the Welsh people for their prejudices against the English language and their adherence to their native language), an incomplete draft of a play entitled 'Deio Meurig's Visit to Pwllhely on a Saturday afternoon in June', English and Welsh verses; etc.

A translation by Stephens of a treatise on the position occupied by Welsh among languages of Celtic origin.

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

A file of mainly printed material, together with a small quantity of letters, concerning the preparation of the new Welsh Language Bill and the resultant act, including a copy of Recommendations for a New Welsh Language Act, a report published by the Welsh Language Board in February 1991. There are also some parliamentary papers.

The file comprises correspondence and papers relating to the preparation and drafting of the Welsh Language Bill, 1993. It includes a large number of reports, circulars and memoranda. The file includes letters from Dr Carl Clowes, David Hunt MP, Emyr Jenkins, Principal Derec Llwyd Morgan, Sir Wyn Roberts (Lord Roberts of Conwy), (2) and Professor J. Beverley Smith (2).

The file comprises miscellaneous items assembled by Lady White relating to the drafting and preparation of the Welsh Language Bill. The file includes a letter from Lord Prys-Davies, 1987.

The file consists of a manuscript report entitled 'Labour and the Welsh language: an integrated policy' prepared by Gareth Howells, Cardiff, April 1973.

An analysis of the derivation of place and personal names found in Bishopston and Pennard; miscellaneous notes on Welsh authors, mainly of the seventeeth century, and their works; an outline of Thomas Pennant: Tours in Wales (London, 1810); notes on the Welsh language, including the language of the Welsh Bible; notes on eminent Welshmen; Welsh references in the British Museum Additional Manuscripts; etc. The material is in both English and Welsh.

Correspondence relating to the rights of employees and customers to use the Welsh language, along with a personal case regarding power of attorney.

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.

Torion papur amrywiol, 1934-1978, y mwyafrif yn cynnwys cyfeiriadau at genedlaetholdeb, addysg Gymraeg, a chrefydd a diwylliant Cymru. Ymddengys mai torion a grynhowyd gan Elizabeth Williams yw'r rhain, ac yn eu plith mae erthyglau ganddi hi a G. J. Williams ar yr iaith Gymraeg. Ceir hefyd nodiadau ar ddiwylliant, crefydd ac iaith, nifer gan ac yn llaw Elizabeth Williams.

Papurau John Davies, 1962-1971, y cyfan yn ymwneud â Chymdeithas yr Iaith Gymraeg a'r iaith Gymraeg, yn cynnwys gohebiaeth John Davies ag arweinwyr cynnar y Gymdeithas,1962-1971, yn eu mysg E. G. Millward, 1962-1965; cofnodion cyfarfodydd y Gymdeithas, 1962-1963; ffurflenni treth Cymraeg a dwyieithog, 1963-1964; amrywiol erthyglau llawysgrif a chyhoeddedig John Davies ac eraill, 1963-1968; copïau o Tafod y Ddraig, 1963-[1971]; papurau ariannol, [1960s]; a chardiau, taflenni a phamffledi, [1960au] = Papers of John Davies, 1962-1971, all relating to Cymdeithas yr Iaith Gymraeg and the Welsh language, including correspondence of John Davies with early leaders of the Society, 1962-1971, including E. G. Millward, 1962-1965; minutes of Society meetings, 1962-1963; Welsh and bilingual tax forms, 1963-1964; various manuscript and published articles by John Davies and others, 1963-1968; copies of Tafod y Ddraig, 1963-[1971]; financial papers, [1960s]; and cards, leaflets and pamphlets, [1960s].

Llythyrau, 1915-1977, at Elizabeth Williams, nifer yn ymwneud â G. J. Williams a chyhoeddi ei waith; capel Bethesda'r Fro; dyfodol yr iaith Gymraeg; Undeb Cymru Fydd a Phlaid Cymru. Ymhlith y gohebwyr amlycaf mae Glyn Ashton, Rachel Bromwich (2), D. Simon Evans (4), Aneirin Talfan Davies, Cassie Davies, Rachel Ellenborough (21, ynghyd â pheth o'i gwaith dan yr enw Rachel Law, a gwybodaeth yngŷn ag achau'r teulu (Iolo Morganwg)), Gwynfor Evans (2), Raymond Gower, Bedwyr Lewis Jones (2), Bobi Jones (2), D. Gwenallt Jones (3; ac 1 oddi wrth Nel Gwenallt ar farwolaeth ei gŵr), E. D. Jones (6), Ceri Lewis, Saunders Lewis (3; un oddi wrtho at ei wraig, Margaret, pan oedd yn y carchar; a 3 oddi wrth Margaret at Elizabeth Williams; ac 1 llythyr, 1931, at Saunders Lewis oddi wrth J. Alun Pugh), Timothy Lewis (2), T. J. Morgan, Rhys Nicholas, Iorwerth Peate, Eurys Rowlands, R. J. Thomas (6), a D. J. Williams (6).

Mae'r grŵp hwn yn cynnwys torion o erthyglau Angharad Tomos i Y Faner, copïau teipysgrif a rhai torion o'i cholofn olygyddol a'i cholofn fel Cadeirydd yn Nhafod y Ddraig, ynghyd â nodiadau ar gyfer rhai o'i hareithiau ac ambell erthygl amdani hi, 1979-1983.

Cyhoeddiadau a phapurau ymchwil G. J. Williams ar yr iaith Gymraeg, gan gynnwys llawysgrif ei draethawd ymchwil, 'The verbal forms in the Mabinogion and Bruts'; darlithoedd ac erthyglau amrywiol ar hanes yr iaith, yr iaith lafar, gramadeg a geirfa, enwau, yr ieithoedd Celtaidd, ac addysg Gymraeg; ynghyd ag ychydig bapurau perthynol i'w waith fel aelod o fwrdd golygyddol Geiriadur Prifysgol Cymru.

Mae'r grŵp hwn yn cynnwys anerchiadau, darlithoedd a pheth gohebiaeth berthynol mewn llawysgrif a theipysgrif, 1996-1998.