File comprises posters, election addresses and a thank you leaflet distributed by Gwynfor Evans' campaign during the Carmarthen by-election in 1966.

File contains Gwynfor Evans' election addresses and posters for the 1966 Carmarthen by-election, along with an official notice of poll, copies of congratulatory telegrams from Saunders Lewis and Lewis Valentine and a copy of congratulatory letter from D. J. Williams.

File contains newspaper cuttings relating to the Carmarthen by-election, 1966.

File contains posters, flyers and copies of newspaper articles commemorating Gwynfor Evans' victory in the 1966 Carmarthen by-election.

The archive comprises election ephemera, including election addresses, posters, drafts of election material, mostly for Plaid Cymru candidates for UK Parliament and local elections, along with some ephemera related to anti-nuclear weapons and anti-nuclear power campaigns and Plaid Cymru publications.