Library staff, have been helpful in many ways, and have shown an exemplary patience in attending to the wants of an exacting and not always patient researcher.
I am very grateful to the University of Michigan for undertaking the heavy cost of publishing this book, and for aid to its preparation given through a grant from the Faculty Research Fund.
The title vignette is the work of my friend Wilfred B. Shaw.
My deep obligations to E. S. McCartney, Editor of our Scholarly Publications, and to Mrs. Alice Foster of the Plimpton Press, cannot be adequately expressed here. These watchful critics have removed many disturbing inconsistencies, detected minor errors, and in many other ways contributed to the good appearance of the book.