What Every Woman Knows is a four-act play written by J. M. Barrie. The show debuted at the Duke of York's Theatre in London on September 3, 1908. It ran for 384 performances. It transferred to the Hicks Theatre on December 1, 1908. The Wylies, a well-to-do but uneducated Scottish family, are concerned about their daughter, Maggie, a woman who has no charm (meaning she is not sexually attractive) and may therefore never be married. One night the Wylies discover that a serious young university student, John Shand, has been breaking into their home so that he can read books from their large library...