T. W. J. (Thomas William John) Connolly

Thomas William John Connolly (1815–1875), often published as T. W. J. Connolly, is associated with the Royal Sappers and Miners and is best known for writing History of the Corps of Royal Sappers and Miners. Surviving catalog and archive records identify him as the author of that major history and connect him with the corps as a military man as well as a historian.

His best-known book was published in the mid-19th century and stands out for its close attention to the organization, campaigns, and daily work of the sappers. Because he wrote from within that world, his history has remained useful not only to general readers but also to researchers tracing the development of British military engineering.

Some biographical details appear inconsistently across records, so it is safest to focus on what is well supported: Connolly was a 19th-century writer and military historian whose name remains closely tied to the story of the Royal Sappers and Miners.