This catalogue lists the papers of Oliver Ridsdale Baldwin ('ORB'), elder son of Stanley and Lucy Baldwin, and brother of Windham Baldwin; and also includes groups of letters from him to his parents and (of particular interest) to his companion of thirty-five years, John Parke Boyle. They illuminate all the main aspects of his career: as a soldier in both World Wars, as Labour politician, author, journalist, film critic, and as Governor of the Leeward Islands. The papers have been used extensively by Mr Christopher J. Walker in his recent biography, 'Oliver Baldwin: a life of dissent' (Arcadia Books, 2003), a copy of which is among the papers (MS Add.9735/14/3/1).