Duplicate copies of 'Pen' reports, not by Hodgkin, issued in a limited number by the Secretary to the Research Panel of the Penicillin Conference and Chemical Committee. The reports form part of a numbered sequence, and some are printed on standard forms, over-printed 'Property of the Therapeutic Research Corporation of Great Britain Limited'.

Part of a box folder labelled, 'C.P.S. [Committee for Penicillin Synthesis] Reports. Penicillin. 1940s - secret. Bunn and D.C. papers and letters.' Comprising: