the last edition of this _Study_ was issued, so vast an amount of work has
been carried on in this field that the preparation of a new edition of the
book has been a long and serious task. Nearly every page has been
rewritten or enlarged and the Index of Authors consulted has more than
doubled in length. The original portions of the book have been still more
changed; sixteen new Histories have been added, selected from others in my
possession as being varied, typical, and full.

These extensive additions to the volume have rendered necessary various
omissions. Many of the shorter and less instructive Histories contained in
earlier editions have been omitted, as well as three Appendices which no
longer seem of sufficient interest to retain. In order to avoid undue
increase in the size of this volume, already much larger than in the
previous editions, a new Study of Eonism, or sexo-esthetic inversion, will
be inserted in vol. v, where it will perhaps be at least as much in place
as here.

HAVELOCK ELLIS.




PREFACE TO FIRST EDITION.


It was not my intention to publish a study of an abnormal manifestation of
the sexual instinct before discussing its normal manifestations. It has
happened, however, that this part of my work is ready first, and, since I
thus gain a longer period to develop the central part of my subject, I do
not regret the change of plan.