Folder B.29.1: Extensive miscellaneous early calculations on wave functions, and 2s and 2p screening, concerning methane and neon, small and large separations, 1933-1936. This is a bulky folder incorporating several folders of notes, some labelled and described by Coulson, and some loose papers. Folder B.29.2: Extensive working papers and correspondence on H3, H3 +, and H3 …