Personal correspondence, including letters from brother Gilbert a'Beckett, Sir Thomas a'Beckett and her husband, 1902-1960; Companies' and Societies' material (circulars, advertisements, information notes, minutes, reports) 1917-1951; Newspaper cuttings, invitations etc., 1929- 1954; accounts, tax assessment; Diaries, 1901-1958; engagement books, 1938-1961; papers given by Lady Moore to various societies; pattern books, architect's drawing, etc.