Folder B.33.1: 'Problems on hand', 1936-1948. Extensive folder of notes (many only 1 or 2 pages long) on problems and questions for research. Folder B.33.2: 'Graphite: tight binding and loose binding', 1939. Several sets of ms. notes. Includes a letter to J.E. Lennard-Jones regarding publications on graphite, 3 July 1939. Folder B.33.3: 'Classical lengths of links in aromatics', 1939. Several sets of MS. working notes, with later amendments and…