Minor typographical errors have been corrected without note. Other
errors are noted below.
Punctuation and spelling were made consistent when a predominant
form was found in this book; otherwise they were not changed.
Ambiguous hyphens were retained.
Mid-paragraph illustrations have been moved between paragraphs and
some illustrations have been moved closer to the text that
references them. The List of Illustrations paginations and those in
image captions were not corrected.