THE RED THUMB MARK


BY R. AUSTIN FREEMAN




PREFACE

In writing the following story, the author has had in view no purpose
other than that of affording entertainment to such readers as are
interested in problems of crime and their solutions; and the story
itself differs in no respect from others of its class, excepting in that
an effort has been made to keep within the probabilities of ordinary
life, both in the characters and in the incidents.

Nevertheless it may happen that the book may serve a useful purpose in
drawing attention to certain popular misapprehensions on the subject of
finger-prints and their evidential value; misapprehensions the extent of
which may be judged when we learn from the newspapers that several
Continental commercial houses have actually substituted finger-prints
for signed initials.

The facts and figures contained in Mr. Singleton's evidence, including
the very liberal estimate of the population of the globe, are, of
course, taken from Mr. Galton's great and important work on
finger-prints; to which the reader who is interested in the subject is
referred for much curious and valuable information.