Reginald R. Sharpe was a prominent English historian and antiquarian, best known for his extensive work on the history of London. His most significant contribution, the three-volume series 'London and the Kingdom,' published in the late 19th and early 20th centuries, meticulously chronicled the city's development and governance, drawing heavily from the archives at Guildhall. This monumental work not only provided a detailed account of London's history but also served as a vital resource for future historians and researchers, showcasing the city's rich heritage and its evolution over the centuries. Sharpe's scholarship was characterized by a rigorous approach to primary sources, which he utilized to illuminate various aspects of London's past, including its political, social, and economic transformations. His dedication to archival research set a standard for historical writing in the field, influencing subsequent generations of historians. Beyond his published works, Sharpe was involved in various historical societies and contributed to the preservation of London's history through his advocacy for the importance of archival materials. His legacy endures in the continued relevance of his historical analyses and the foundational role they play in the study of London's history.