Papers and letters relating to Christian missions in Wales, 1942-1950, 1974; papers relating to the mission in Blaendulais, 1952; the 'Yr Ymgyrch Newydd yng Nghymru' newsletter, and letters 1949-1951 and correspondence between Erastus Jones and Griff J. Miles, 1948-1951, 1987-1988.