1. Minor changes have been made to correct typesetters' errors;
otherwise, every effort has been made to remain true to the author's
words and intent.
2. In the advertising pages, titles were in bold font; + has been used
in this text version to indicate that.
3. Following the title page, this edition included a page of magazine
and newspaper reviews of William Le Queux's books. This has been moved
to just before the advertising pages at the end of this e-text.