Correspondence, press cuttings, papers and campaigns of the Aberfan Disaster and the Aberfan Disaster Fund, 1966-1968; religious life of Aberfan, 1967-1968, and miscellanea, 1958-1980; personal correspondence, 1958-1967; press cuttings, 1967-1973; journals and leaflets, 1968-1979; and papers relating to his ministry in Melbourne, Australia, 1990.

Papurau y Parch. Evan Wyn Williams, 1966-1969, yn cynnwys papurau'n ymwneud â thrychineb Aberfan, 1966-1968; a phapurau'n ymwneud â chanmlwyddiant Capel Coffa (1869-1969) Edward Jones ym Mathafarn = Papers of Rev. Evan Wyn Williams, 1966-1969, comprising papers relating to the Aberfan disaster, 1966-1968; and papers relating to the centenary of Capel Coffa (1869-1969) commemorating Edward Jones at Bathafarn.