From the front: notes on 'Penicillin Purifications', September 1941 - February 1943 (some later notes may not relate to the heading); from the back: notes regarding experiments on penicillin and related compounds, November 1941-July 1942; notes following the heading 'Penicillin: Mode of Action etc. 10.1.45', January-April 1945; notes following the heading 'Proactinomycin', April-September 1945; 1 further page of notes, January [?1946].