Royal Commission on Ancient Monuments in Wales, Ychwanegu i'r clipfwrdd I. Is-fonds 1919-1954. Rhan oRobert Richards MP Papers,
'The monastic houses of Wales and the border', Ychwanegu i'r clipfwrdd III. Is-fonds 1941-1954. Rhan oRobert Richards MP Papers,
Temperance and religion, Ychwanegu i'r clipfwrdd VI. Is-fonds 1924-1949. Rhan oRobert Richards MP Papers,