William Watson Cheyne (1852-1932), a surgeon by training and a student of Joseph Lister, was a prominent British bacteriologist who published 60 papers and 13 monographs from 1879 to 1927. A proponent of the idea that bacteriology and medicine were interdependent disciplines, he investigated the causes and treatment of wound infections, tuberculosis, cholera, tetanus and gangrene. In 1897, he organized an historical outline of 19th century bacteriology in five landmark periods of discovery, each defined by the work of an influential figure. This study documents his contributions to the history of microbiology and describes his activities as a laboratory investigator, clinician, surgeon, translator, editor and educator.