Contains papers relating to meetings of Y Cabinet Iaith (The Language Cabinet) and Fforwm Iaith Genedlaethol (National Language Forum) including agendas, minutes, reports.

Correspondence related to the work of Fforwm Iaith Genedlaethol, mainly related to the administration of the Forum, Strategaeth Iaith Genedlaethol 1991-2001 (National Language Strategy), Cynllun Iaith Ardal (Area Language Plans), the Welsh Language Act 1993, Welsh as a subject in schools, language rights and the provision of Welsh language services by public and private sector bodies.

Correspondence regarding census questions on fluency in Welsh, Gaelic and Irish along with statistical documents from the census for Gwynedd, Powys and South Glamorgan.

Sub fonds contain papers related to the work of Fforwm Iaith Genedlaethol (National Language Forum), an umbrella group of 26 organisations which was formed to campaign for a Welsh Language Act and which developed Strategaeth Iaith 1991-2001, a strategy to secure a safe and prosperous future for the Welsh language.
Member organisations of Fforwm Iaith Genedlaethol includes; Adfer, Canolfan Iaith Clwyd, Canolfan Iaith Genedalethol Nant Gwrtheyrn, Cefn, Cyd, Cymdeithas y Cyfamodwyr, Cymdeithas Tau Gwledig Cymru, Cymdeithas yr Iaith, Cyngor Llyfrau Cymraeg, Merched y Wawr, Mudiad Ysgol Meithryn, Pont, Pwyllgor Gyd-enwadol yr Iaith Gymraeg Arfon, Rhieni dros Addysg Gymraeg, Undeb Cenedlaethol Athrawon Cymru, Undeb Cenedlaethol Myfyrwyr Cymru, Undeb Myfyrwyr Cymraeg Aberystwyth, Undeb Myfyrwyr Cymraeg Bangor, Urdd Gobaith Cymru, Y Colegiwm Cymraeg, Y Gymdeithas Feddygol, and Eisteddfod Genedlaethol Cymru.

Questionnaire to incumbents concerning the Welsh Language, 1961 and includes a questionnaire signed by T. Bayley Hughes.

General correspondence and political papers including material related to the Welsh Hospitals Board, the Welsh language, Welsh language legislation, devolution, the Labour Party, elections and broadcasting.

Minute-book, 1870-1902, of the Welsh Language Debating Society at St David's College, Lampeter.

Wyn Roberts' diary from April 1992 to August 1993.

Wyn Roberts' diary from January 1991 to April 1992.

Wyn Roberts' diary from May 1985 to November 1988.

Wyn Roberts' diary from May 1979 to January 1981.

'Casgliad o eiriau yn y Beibl Cymraeg, sydd naill ai wedi newid eu hystyr, ney ynte wedi myned allan o arferiad, ynghydag eglurhad arnynt', written for 'Cyfarfod Llenyddol y Bala, Nadolig, 1886'.

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].

The file comprises correspondence, 1926, mainly relating to radio programmes in Welsh and the need for a Welsh national broadcasting station.

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

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.

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.

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

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