Davis, H. W. C. (1927). "Cadogan, George henry, fifth Earl Cadogan (1840–1915)". Dictionary of National Biography, Twentieth Century, 1912-1921. Oxford University Press. pp. 84–85. Retrieved 24 October 2023 – via Internet Archive.
Gibbs, Vicary, ed. (1912). The Complete Peerage, Volume II. St Catherine Press. p. 463. Retrieved 24 October 2023 – via Google Books. States he was born at "Durham College".