Lieutenant-Colonel Frederick Sadleir Brereton, CBE (5 August 1872 – 12 August 1957) who often wrote under the name Captain Brereton, was a British Army medical officer and an author of children's books on heroic deeds conducted in the name of the British Empire.
During the Second Boer War he was attached as a medical officer to the Scots Guards.
[2] He retired his commission on 22 November 1902, after the end of the war in South Africa.
[3] Brereton served again in the RAMC during the First World War with the rank of Brevet Lieutenant Colonel.
[4] Brereton married Ethel Lamb in 1898 and Isobel Murdoch in 1953.