Folder B.17.1: 'Interstitials in graphites', 1963-1967. Extensive correspondence with colleagues and with publishers regarding Coulson's paper and its findings. Notes, charts and diagrams, and related offprints by Coulson and others. Folder B.17.2: 'Symmetry in Chemistry', 1970-1974. Proposed article to be written by Coulson for Chemie in unserer Zeit. Correspondence with editors, Coulson's notes, background…