(Fols. 88-89) Two letters from Charles Fletcher to his sister Anne Hopkinson which touch on his involvement in the development of penicillin in 1941. As a clinician at the Radcliffe Infirmary in Oxford, Fletcher worked with the soon to be Nobel-prize winning scientists at the University of Oxford's Sir William Dunn School of Pathology to perform the first clinical trials of penicillin. On 17 January 1941 he had administered the first ever injection of penicillin into a human patient. In…