The purpose of this book is to describe the Duke of Rohan's role as a political leader of the Huguenot party from 1621 to 1629 placing somewhat less emphasis on his military achievements. It makes no claim to biographical completeness. The narrative is based on contemporary books and pamphlets and on manuscripts in the Biblio theque nationale, the British Museum, and the Public Record Office. Research was also done at the Newberry Library, the Library of Congress, and at the University of Wisconsin's Memorial Library.