their share in the production of this book:
_To_ DUREN J. H. WARD, PH. D., formerly of the Anthropology Department
of Harvard University, who, as the discoverer of the fourth human type,
has added immeasurably to the world's knowledge of human science.
_To_ RAYMOND H. LUFKIN, of Boston, who made the illustrations for this
volume scientifically accurate.
_To_ THE ROYCROFTERS, of East Aurora, whose artistic workmanship made it
into a thing of beauty.
_And last but not least,_
_To_ SARAH H. YOUNG, of San Francisco, our Business Manager, whose
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