Folder B.2.1 (1951-1954): 'The contribution of wave mechanics to chemistry'. The Tilden Lecture, The Chemical Society, delivered in London 1951 and in Glasgow 1952. Working notes, supplementary material and related offprints. MS., heavily corrected typescript, list of slides for lecture, list of figures for published version. Correspondence regarding arrangements for delivery and publication. Folder B.2.2 (1962, 1970): 'Fun with…