General correspondence, 1950-74, to Desmond Donnelly and carbon copies of letters from him, including letters form Dean Acheson, Sir Anthony Eden and Sir Roy Welensky and other prominent British and international political figures; papers relating to various topics including Pembrokeshire politics and general elections, 1916-1968, Donnelly's foreign travels and international affairs, 1949-1972, his publications, 1958-1966, the United Democratic Party, 1969-1970; a scrapbook relating to the British Empire Cricket Team, diary extracts, papers and other personal material, 1941-1974; copies and drafts of articles and speeches by Donnelly, 1949-1973; and a large group of press cuttings, 1921, 1946-1978. There is also a scrapbook belonging to John Wynford Philipps, 1897-1908.

A scrapbook containing copies of election addresses, etc. of parliamentary candidates for Pembrokeshire, including some of John H. Allen, Cresselly, with figures showing the state of the poll in 1714, 1768, 1780 and 1807, and press cuttings relating to elections and candidates and to law-cases, some of them being cases of Pembrokeshire interest.

Papers of political interest, 1909-1995, including papers relating to local and general elections, in Swansea West, 1982-1983; Pontypridd, 1987; Pembroke, 1991-1992; Vale of Glamorgan, 1985-1993; papers relating to the SDP, 1983-1994, including correspondence, minutes, press releases; papers relating to the SDP/Liberal Alliance, 1987-1988; papers of the Alliance Committee for Wales, 1985-1987, including correspondence, minutes of meetings, drafts of speeches, memoranda; papers of the SDP Welsh Council, 1981-1988, including correspondence, minutes of meetings, newspaper cuttings; papers of the Welsh Regional Economic Policy Group, 1981-1982; papers of the Vale of Glamorgan SDP, including CVs of prospective candidates, 1982-1983; personal papers of Peter Sain Ley Berry, [c. 1981]-1988, including correspondence and diaries; printed material, 1977-1995, including SDP policy documents and manifestos; records of the Lloyd George Society, including correspondence, 1975-1993, and printed material, 1909-1991; papers of the Welsh Centre for International Affairs, 1986-1991; and miscellaneous material, 1968-1984. The 2003 Donation, as yet uncatalogued, comprises further papers, c. 1982-2000, relating to the SDP, including papers relating to the Hillhead bye election and miscellaneous Wales in Europe papers.