Papers, 1923-[2008], relating to the career and personal life of Kyffin Williams, comprising correspondence, 1923-2006, mostly letters addressed to him; journals and engagement diaries, 1939-2006; catalogues and papers, 1950-2006, relating to exhibitions of his work; books and articles, including drafts, [?1965]-[2004], written and illustrated by Kyffin Williams; works about him by other authors, 1953-[2008]; drafts and preparatory notes, [1954x2000], of talks and addresses; financial papers, 1939-2005; papers, 1973-2004, relating to mainly Welsh art galleries; and personal papers, 1931-2006.