This is where she ran the first clinical trials of penicillin in 1941 along with her lab partner and husband Howard Walter Florey, leading to him winning the Nobel Prize.
It was the Florey team who actually made a useful and effective drug out of penicillin, after the task had been abandoned as too difficult.
Mary Ethel Florey's work included administrating and recording "the clinical progress of the first large-scale trial of 187 cases of sepsis".
The British Journal of Surgery published a review on the book in 1953 reading: "It is a veritable encyclopaedia for the use and abuse of penicillin.
It surely must take its place in the library of every hospital as valuable work of reference, not only for the clinician but also the pathologist.