Proof copy of an authoritative account of one of the most transformative discoveries in modern medicine. Drawing on his own experience as a bacteriologist at St. Mary’s Hospital - where he witnessed Alexander Fleming’s work firsthand - Hare recounts the accidental discovery of penicillin and its revolutionary impact on chemotherapy. The narrative blends scientific precision with vivid personal insight, tracing Fleming’s life from rural Ayrshire to the laboratory where he first noticed the mould that changed the world. Clean pages; some creasing to spine; wear to dust jacket with small loss to lower margin. A scarce proof of an important historical and scientific study by the Emeritus Professor of Bacteriology at the University of London. A proof copy is a preliminary version of a book that is printed and bound for the primary purpose of review and correction before the actual publication.