Papers 1984-5, mainly relating to the involvement of Welsh women in the Miners' Strike of those years and its aftermath and in particular to the activities of the South Wales Women's Support Groups. They comprise papers relating to the South Wales Women's Support Group with letters from the secretary, Kath Jones, and associated leaflets, handbills and posters, with papers relating to the Swansea, Neath and Dulais Valley Support Group, the National Organisation of Women Against Pit Closures, the Wales Congress in Support of Mining Communities, and Greenham Common women.

Cofnodion Plaid Cymru, 1915-1999, yn cynnwys cofnodion, agenda and gohebiaeth y pwyllgor gwaith a phwyllgorau eraill, 1925-1997; gohebiaeth gyffredinol, 1925-1998, gyda nifer o aelodau a swyddogion blaenllaw y blaid; cofnodion, gohebiaeth a phapurau eraill y gwahanol bwyllgorau rhanbarthol, 1925-1997, a changhennau,1930-1992; cofnodion a dogfennaeth y Cyngor Cenedlaethol, 1967-1997; cofnodion ariannol, yn cynnwys rhai papur newydd misol y blaid Y Ddraig Goch a Welsh Nation a Chronfa Gŵyl Ddewi, 1927-1996; rhaglenni a threfniadau ar gyfer cynadleddau ac Ysgolion Haf, 1933-1998; cofnodion aelodaeth, 1930-1996; papurau y Grŵp Ymchwil, [c.1960]-1995; papurau, yn cynnwys areithiau ac effemera, yn ymwneud ag etholiadau, 1929-1999; papurau yn ymwneud ag Adran y Menywod, 1924-1996, a'r Mudiad Ieuenctid, 1964-1998; papurau yn ymwneud â refferendwm datganoli 1979,1969-1983, a refferendwm 1997, a Chynulliad Cymru,1992-1998; papurau yn ymwneud â Y Ddraig Goch, Welsh Nation a chyhoeddiadau eraill, 1932-1996; deunydd printiedig gan Blaid Cymru ac eraill yn cynnwys llyfrau, cyfnodolion a phamffledi,1913-1996; torion o'r wasg, 1924-1996; cylchlythyron, 1938-1992; papurau yn ymwneud â'r Blaid Seneddol,1980-1996; papurau unigolion ac rhai ar wahanol bynciau amrywiol, 1926-1998 = Records of Plaid Cymru, 1915-1999, including minutes, agendas and correspondence of the executive and other committees, 1925-1997; general correspondence, 1925-1998, with many prominent party members and officials; minutes, correspondence and other papers of the various regional committees, 1925-1997, and branches, 1930-1992; minutes and records of the National Council, 1967-1997; financial records, including those of the party's monthly newspaper Y Ddraig Goch and Welsh Nation and Cronfa Gwyl Dewi, 1927-1996; arrangements for and programmes of conferences and Summer Schools, 1933-1998; membership records, 1930-1996; papers of the Grŵp Ymchwil (research group), [c.1960]-1995; papers, including speeches and ephemera, relating to elections, 1929-1999; papers relating to the Adran Menywod (Women's Section), 1934-1996, and the Mudiad Ieuenctid (Youth Movement), 1964-1998; papers relating to the 1979 devolution referendum, 1969-1983, and the 1997 referendum and Welsh Assembly, 1992-1998; papers relating to Y Ddraig Goch, Welsh Nation and other publications, 1932-1996; printed matter by Plaid Cymru and others including books, periodicals and pamphlets, 1913-1996; press cuttings, 1924-1996; circulars, 1938-1992; papers relating to the Parliamentary Party, 1980-1996; papers of individuals and to various miscellaneous topics, 1926-1998.