Letters, agendas of meetings, notes, reports, postcards, circulars, newsletters, leaflets, forms, invoices, programmes, sheet music, song lyrics, statements, articles, press releases and press cuttings concerning numerous cultural movements, institutions, events and publications in Cornwall, including Cowethas an Yeth Kernewek, its journal An Gannas, Cowethas Flamank, Agan Tavas, Lowender Peran, Kelgh Keltek, Cowethas Ylow Kernewek, Dalleth, An Gresen Gernewek, Esethvos Kernow, Kesva an Tavas Kernewek, Keskerth Kernow, Kescusulyans Kernow, the Cornish Declaration Group, the Cornish Bureau for European Relations, and a Cornish language weekend, as well as cultural and political matters in Ireland, Brittany and Galicia including Breton prisoners, the Pan-Celtic festival, meetings of the Celtic Congress in Cornwall and Shetland,the Kerrier Celtic choir festival, the Lorient festival, Celtic films, and the Celtic languages, with particular reference to Roy Green's involvement in Cornish and Celtic culture and politics and his related contributions to journals and organisations including the Irish Democrat, Soviet Weekly, and the Murdoch House (Redruth) Workers' Educational Association and Labour History Group.