Preface to the Third Edition
At the request of the publishers the following statement is made as a substitute for the former indefinite arrangement in respect to authorship.
The plan and composition of the book were mine; the work of my colleagues, F. E. Crawford and H. T. Richardson, consisting of criticism, verifications, and assistance in gathering materials for the appendix,—services of great value to me, and of which I wish to express my high appreciation.
A few additions have been made in this edition, and the book has been carefully revised throughout.
FRANK PARSONS.
Boston, January, 1893.