This book has been considered by academicians and scholars of great significance and value to literature. This forms a part of the knowledge base for future generations. So that the book is never forgotten we have represented this book in a print format as the same form as it was originally first published. Hence any marks or annotations seen are left intentionally to preserve its true nature.

Roberto Rusconi is Professor of the History of Christianity in the Department of History at the University of Aquila. Blair Sullivan is a medieval scholar at the Center for Medieval and Renaissance Studies, University of California, Los Angeles.