Mary Anne (novel)

Daphne du Maurier's novel Mary Anne (1954) is a fictionalised account of the real-life story of her great great grandmother, Mary Anne Clarke née Thompson (1776-1852).
Mary Anne Clarke from 1803 to 1808 was mistress of Frederick Augustus, the Duke of York and Albany (1763-1827).
He was "The Grand Old Duke of York" of the nursery rhyme, a son of King George III and brother of the later King George IV.