Is-gyfres AD - Gohebiaeth swyddogol Mary a Robert (Silyn) Roberts (Cymdeithas Addysg y Gweithwyr) = Official correspondence of Mary and Robert (Silyn) Roberts (Workers' Educational Association)

Gohebiaeth a chopïau o ohebiaeth, 1929-1944, yn bennaf rhwng Swyddfa Ranbarthol Cymdeithas Addysg y Gweithwyr, a leolwyd yng Ngholeg Prifysgol Cymru, Bangor, a Choleg Harlech, ynghyd â gohebiaeth oddi wrth bencadlys Cymdeithas Addysg y Gweithwyr yn Llundain (prif ohebydd Ernest Green, ysgrifennydd cyffredinol y Gymdeithas) at y Swyddfa Ranbarthol a gohebiaeth rhwng y Swyddfa Ranbarthol a darpar-fyfyrwyr Coleg Harlech. = Correspondence and copies of correspondence, 1929-1944, primarily between the District Office of the Workers' Educational Association, located at the University College of Wales, Bangor, and Coleg Harlech, together with correspondence from the Workers' Educational Association headquarters in London (main correspondent Ernest Green, general secretary of the Association) to the District Office and correspondence between the District Office and prospective Coleg Harlech students.