The originals of the illustrations reproduced for this work were collected from museums, conservatories, antiquaries, public and private libraries, and other authentic sources in England and on the Continent, by Mr. Arthur J. Mundy, who spent several months in making a special search.

The authorities in London, Paris, Rome, Florence, Venice, Vienna, Leipsic, Dresden, Berlin, and other places visited, gladly assisted in making the collection as complete as possible.

This material was placed in the hands of Mr. Karl Klauser, who made valuable additions to it from his private collection of authentic portraits. A lifelong study of this subject enabled him to contribute valuable notes and comments on the illustrations.

The ornamental half-titles, headpieces, and initials were designed by Mr. E. B. Bird, of Boston.