The success of my revised edition of Mr Crawley's The Mystic Rose has encouraged me to bring together in the present volume some of his papers previously unpublished in book-form, on subjects akin to those of his great work. Mr Crawley's treatment of these problems of sexual anthropology, especially on the psychological side, was, in the years in which he was most actively at work, too uncompromisingly original to meet with general acceptation, even in academic circles. But now his standpoint, which can perhaps be best described as being that of a profound psychological analysis on the basis of biological common-sense, is beginning to be appreciated. And the following papers will be found, I think, to contain all those qualities which so sharply differentiate Mr Crawley's work from that of most other students in the same fields.