David Bayne Horn (1901–1969) was a British historian specializing in diplomatic and European history of the 17th through 19th centuries.
), had been assigned to the Public Works Department in Bengal.
at the University for his thesis on Sir Charles Hanbury Williams and European diplomacy.
[3] A writer as well as a lecturer, Horn's main interest lay in the field of 18th century diplomatic history and, in particular, 18th century British foreign policy.
In his research, he reconstructed the social and political lives of diplomats and envoys through their private and public papers.