Chapter 1- THE PRISONER

Alexandre Dumas elaborated on the story in the novel The Vicomte of Bragelonne: Ten Years Later, the final installment of his D'Artagnan saga: here the prisoner is forced to wear an iron mask and is Louis XIV's identical twin.
Dumas also presented a review of the popular theories about the prisoner extant in his time in the chapter "L'homme au masque de fer" in the sixth volume of his Crimes Célèbres.