Papurau Cymdeithas Telynau Cymru, 1961-1987, yn cynnwys cofnodion y pwyllgor gwaith, 1963=1982; cofnodion pwyllgor Gweithdy'r Delyn, 1961-1983; rhestri aelodaeth, 1967-1981; adroddiadau blynyddol,1967-1980; papurau ariannol, 1966-1983; gohebiaeth gyffredinol,1968=1981, a gohebiaeth ynglŷn â diddymu'r Gymdeithas, 1981-1987, a lluniau o Rali Byd y Delyn, 1977 = Papers of Cymdeithas Telynau Cymru, 1961-1987, including executive committee minutes, 1963-1982; Harp Workshop committee minutes, 1961-1963; membership lists, 1967-1981; annual reports, 1967-1980; financial papers, 1966-1983; general correspondence, 1968-1981, and correspondence concerning the dissolution of the society, 1981-1987; and pictures from Rali Byd y Delyn, 1977.