Henry Mainwaring in the King's cause in the English Civil War, was exiled to France, and died in poverty. He was buried at St. Giles' Church, Camberwell, London, on 15 May 1653. Mainwaring married a daughter of Sir Thomas Gardiner in 1630. She died in 1633. His brothers were Sir Arthur Mainwaring, Carver to Prince Henry, George Mainwaring, the defender of Tong Castle, and Sir Thomas Mainwaring, the Recorder of Reading. The Mainwaring family was old and distinguished, probably having arrived in England in the train of William the Conqueror (1066). Henry Mainwaring Sir Henry Mainwaring (1587–1653), was an English lawyer, soldier,
Captain Mainwaring bitter about Wilson's wealthy upbringing; being raised by a nanny, a father who held a career in "the City", and having attended public school, believing it made him "wet", while his own grammar school background is a positive attribute (Mainwaring went to Eastbourne Grammar School and Wilson went to Meadow Bridge public school). Mainwaring is an inverted snob who believes that it is the class system that prevents his promotion to the higher echelons of the Bank. By contrast, Wilson seems to have no social ambitions at all, is down to earth and easy going and seems amused by Mainwaring's