aug 24, 1669 - "The Man in the Iron Mask", a prisoner identified as "Eustache Dauger", arrives at the French fortress of Pignerol, with Bénigne Dauvergne de Saint-Mars in charge of his incarceration. Because the identity of the prisoner is kept secret with a cloth mask over his face, a legend begins that his facial covering is made of iron. Dauger's identity is never confirmed, but French novelist and historian theorizes in a 1965 book, Le Secret du Masque de fer, that Dauger was the older, illegitimate brother of France'