Lord Monmouth is Lord Hertford, whom Thackeray depicted as the Marquess of Steyne, Rigby is John Wilson Croker, Oswald Millbank is Mr. Gladstone, Lord H. Sydney is Lord John Manners, Sidonia is Baron Alfred de Rothschild, and Coningsby is Lord Lyttelton.

Lord Henry Sydney was the son of a duke, and Millbank was the son of one of the wealthiest manufacturers in Lancashire.