Papers of the Reverend Erastus Jones relating to his contribution to the Ecumenical Movement in Wales, including papers of such movements as the Welsh Ecumenical Society, the Council of Churches for Wales and the New Advance in Wales, including correspondence, minutes, some accounts and other papers; papers relating to his work and ministry in Blaendulais, 1948-1967, and his work within the community of Aberfan after the disaster of 1966, including minutes of various committees, correspondence, publications, accounts and papers relating to the Blaendulais Ecumenical Centre and Tŷ Toronto; papers relating to the Ecumenical Movement in Wales in general and relating to contacts in Europe.