When I began to gather the material for this volume I was quite doubtful as to whether the public would be interested in a work of this kind or not. As my labor progressed, however, it became evident that not only the body of the people, but authors themselves, were deeply interested in the subject, and would welcome a book treating of it. Not only M. Jules Claretie, the celebrated Parisian literarian, but the late Dr. Meissner and many others assured me of this fact.