Marie Adelaide Elizabeth Rayner Lowndes (née Belloc; 5 August 1868 - 14 November 1947), who wrote as Marie Belloc Lowndes, was a prolific English novelist, and sister of author Hilaire Belloc. Active from 1898 until her death, she had a literary reputation for combining exciting incidents with psychological interest. Three of her works were adapted for the screen: The Lodger (1913 novel; numerous film adaptations), Letty Lynton (1931 novel; 1932 film adaptation), and The Story of Ivy (1927 novel; 1947 film adaptation). Additionally, The Lodger was adapted as a 1940 radio drama and 1960 opera.
