A List of Illustrations has been provided for the convenience of the reader.
Punctuation and spelling inaccuracies were silently corrected, except as noted below.
Archaic and variable spelling has been preserved.
Variations in hyphenation and compound words have been preserved.
Inconsistencies in formatting and punctuation of individual advertisements have been retained.
Variations in the name of the evil-faced man, Moriarity and Moriarty, have been retained.
Page numbers in the Table of Contents for Chapters XXIX and XXX have been changed to reflect the actual beginning page number in the text.