Campaign regarding the recording of Welsh language skills on the Census
Part of Papurau Dr Carl Clowes
Correspondence regarding census questions on fluency in Welsh, Gaelic and Irish along with statistical documents from the census for Gwynedd, Powys and South Glamorgan.
Yr Iaith Gymraeg (closed material)
Part of Elfyn Llwyd Papers.
Correspondence relating to the rights of employees and customers to use the Welsh language, along with a personal case regarding power of attorney.
Part of Elfyn Llwyd Papers.
Papers and correspondence mainly relating to the Welsh language and campaigns by Cymdeithas yr Iaith Gymraeg.
Report of Plaid Cymru's Welsh Language Commission
Part of Elfyn Llwyd Papers.
The use of the Welsh language in criminal reports in Wales
Part of Elfyn Llwyd Papers.
A papers written by Elfyn Llwyd on the use of the Welsh language in criminal courts in Wales.
Part of Patrick Hannan Papers
Copy of The Listener magazine dated July 17th 1980 containing an article on page 71 reading Gwynfor Evans' threat to fast to death over the establishment of the Welsh language television channel S4C.