High Quality Content by WIKIPEDIA articles! The Defence of Duffer`s Drift is a short book by Major General Sir Ernest Dunlop Swinton, published in 1904 when Swinton was a Captain. It appeared in the British United Service Magazine under the pseudonym, Lieutenant N. Backsight Forethought, who is the narrator of the book. The book is an exploration of small unit tactics in a fictional encounter in the Boer War. Swinton served in South Africa during the Boer War, and the book "embodies some recollections of things actually done and undone in South Africa, 1899–1902."