The file comprises handwritten drafts of election material for Dafydd Wigley's campaign in Merioneth in 1970 along with newspaper clippings containing details of the 1970 General Election result.

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.