Finally, I want to thank the Editorial Office of the Smithsonian Institution for planning and designing this book; the Government Printing Office for their special care in its production; and Mr. Harold E. Hugo for his expert supervision of the color plates.
A grant from the American Philosophical Society (Johnson Fund), made it possible to conduct research on Jackson in Europe. Acknowledgment is herewith gratefully given.
Jacob Kainen
Smithsonian Institution
September 1, 1961