Cofnodion Neuadd Rhydypennau, 1928-1982, yn cynnwys llyfrau cyfrifon, gan gynnwys rhai'r YMCA, 1928-1968; papurau ariannol ac eraill, 1953-1979; llyfrau cofnodion y pwyllgor, 1932-1980; dyblygion o lythyrau a anfonwyd a llythyrau a dderbyniwyd gan yr ysgrifennydd, 1939-1982. = Records of Neuadd Rhydypennau, 1928-1982, comprising account books, including those of the YMCA, 1928-1968; financial and other papers, 1953-1979; committee minute books, 1932-1980; duplicate outgoing correspondence and letters received by the secretary, 1939-1982.