Daniel Gibson Harris (1915–2007) was an accountant, a British agent during World War II and a writer on Swedish naval history.He was born in Great Missenden, Buckinghamshire, England and, after attending Sherborne School, trained as a chartered accountant. He joined the Royal Naval Supplementary Volunteer Reserve but, having learned Swedish, was sent in 1940 to the British embassy in Stockholm as Assistant Naval Attache, and remained there for the rest of the war.