There is not much to be said upon the subject treated in this volume. When I was invited by the learned and urbane editor of _Harper's Monthly_ to furnish a number of articles upon caricature, I supposed that the work proposed would be a relief after labors too arduous, too long continued, and of a more serious character. On the contrary, no subject that I ever attempted presented such baffling difficulties. After ransacking the world for specimens, and collecting them by the hundred, I found that, usually, a caricature is a thing of a moment, and that, dying as soon as its moment has passed, it loses all power to interest, instantly and forever. I found, too, that our respectable ancestors had not the least notion of what we call decency. When, therefore, I had laid aside from the mass the obsolete and the improper, there were not so very many left, and most of those told their own story so plainly that no elucidation was necessary. Instead of wearying the reader with a mere descriptive catalogue, I have preferred to accompany the pictures with allusions to contemporary satire other than pictorial. The great living authorities upon this branch of art are two in number--one English, and one French--to both of whom I am greatly indebted. The English author is Thomas Wright, M.A., F.S.A., etc., whose "History of Caricature and the Grotesque" is well known among us, as well as his more recent volume upon the incomparable caricaturist of the last generation, James Gillray. The French writer is M. Jules Champfleury, author of a valuable series of volumes reviewing satiric art from ancient times to our own day, with countless illustrations. No one has treated so fully or so well as he the caricature of the Greeks and Romans. Many years ago, M. Champfleury began to illustrate this part of his subject in the _Gazette des Beaux Arts_, and his contributions to that important periodical were the basis of his subsequent volumes. He is one of the few writers on comic matters who have avoided the lapse into catalogue, and contrived to be interesting.