This work serves as a comprehensive bibliographic record of Sir William Osler’s personal collection, designed to illustrate the historical development of medical and scientific thought. Sir William Osler, a prominent physician and educator, curated this collection during his tenure as Regius Professor of Medicine at Oxford. The catalogue represents a decade of collaborative effort between Osler and his associates, W.W. Francis, R.H. Hill, and Archibald Malloch, to organize and annotate over 7,600 items that trace the evolution of medical knowledge.

Medical historians and bibliographers regard this work as a foundational reference for understanding the development of medical literature. Scholars frequently note the immense scholarly detail provided in the annotations, which offer unique insights into Osler’s intellectual priorities and the state of medical research in the early 20th century.