The aristocratic owner of St. Aubyn’s abbey in London. He is the husband of Lady Emmeline d’Orsey and the father of Juliet, Barbara, Clive, Michael, and Temple d’Orsey. The Marquis is a miserable man who loathes his family and is unfaithful to his wife. At the urging of Lady Emmeline, he agrees to have St. Aubyn’s converted into a convalescence hospital during World War I.