Margaret Cavendish, Duchess of Newcastle-upon-Tyne (1623 15 December 1673), was an English aristocrat and a prolific writer. Born Margaret Lucas, she was the youngest sister of prominent royalists Sir John Lucas and Sir Charles Lucas. She became an attendant of Queen Henrietta Maria and travelled with her into exile in France, living for a time at the court of the young King Louis XIV. She became the second wife of William Cavendish, 1st Duke of Newcastle- upon-Tyne in 1645, when she was a marquess.Cavendish was a poet, philosopher, writer of prose romances, essayist, playwright and, some say, a tireless self-publicist, publishing under her own name at a time when most women writers published anonymously. Her writing addressed a number of topics, including gender, power, manners, scientific method, and animal protection. Her romance, The Blazing World, is one of the earliest examples of science fiction.