Birthday cards, telegrams, letters and thank you letters concerning Sir Clough Williams-Ellis' 90th birthday and the various celebrations; papers relating to the celebration at Portmeirion including a list of guests, the programme and invitation, photographs of the party and drafts of Sir Clough's speech, 1973; and pages from The Times, 28 May 1973. The correspondents include Henry, Marquis of Anglesey, Lord Morris of Borth-y-Gest, Robin Cooke, Jan Morris and Sir Donald Gibson.
Conservation: speeches, articles and letters,
Papers, newspaper cuttings, letters and copies of replies concerning various conservation issues including Snowdonia National Park, Lleyn Peninsula, the Council for the Protection of Rural Wales and the Council for the Protection of Rural England, 1955-1972. Correspondents include Lewis Mumford, Henry, Marquis of Anglesey, and Sir Frederick Gibberd.
Mumford, Lewis, 1895-
Letters and copies of replies regarding invitations to Sir Clough and Amabel Williams-Ellis to official openings, lectures, the National Eisteddfod, to meet the Queen at Harlech Castle (1977), various dinners, and also concerning visits to Portmeirion and Brondanw by various parties, 1969-1977. Correspondents include Henry Anglesey, Paul Paget, and Sir Alexander Downer, high Commissioner for Australia.
Letters and telegrams relating to Sir Clough Williams-Ellis's knighthood, and his autobiography, Architect Errant, 1971-1972. Correspondents include the following: Emlyn Hooson MP, François Spoerry, Henry, Marquis of Anglesey, Sir Frederic J. Osborn, Sir Frederick Gibberd, Jan Morris, and Lewis Mumford.
Correspondence relating to Sir Clough Williams-Ellis's recovery after treatment in hospital due to a fall, with papers concerning Portmeirion, the republication of his books, and correspondence between his assistant and others concerning his death, the cancellation of visits and projects, and other subjects, 1977-1978. Correspondents include: Henry Anglesey, Jan Morris, Eirene White, Sir Hugh Wontner, Gerald Dix, Lewis Mumford, Sir Frederic J. Osborn and Lord Cohen of Birkenhead.
Letters and copies of replies covering a wide range of topics from Prof. Gerald Dix, Henry, Marquess of Anglesey, Lewis Mumford, Earl Lloyd George of Dwyfor; and photographs of the town hall in Oundle, 1972-1977.
Letters mainly of a personal nature, including a letter concerning the Presentation Goblet to the Queen and Prince Phillip, 1972; a letter from the Royal Institute of British Architects, concerning Sir Clough Williams-Ellis's election as an honorary member; a letter from the University of Wales offering an honorary degree; and letters from the following: Sir Frederick Gibberd; Sir Frederick Osborn; Jonah Jones; James Morris; Earl Lloyd George of Dwyfor; Charles, Lord Aberconwy; Francois Spoerry; Christabel, Lady Aberconway; Augustus John; the Rt Hon. Richard Crossman, MP; Sir Dingle Foot; Henry, Marquis of Anglesey, and other politicians, artists and members of the gentry and the aristocracy, 1930-1976; together with thirteen letters from Lewis Mumford, 1957-1975, and a copy of an article by him, 1930, 'The Wavy Line Versus the Cube', and a photograph of Sir Clough Williams Ellis and Mumford.