Punctuation, hyphenation, and spelling were made consistent when a predominant preference was found in the original book; otherwise they were not changed. Inconsistent capitalization has been retained. Simple typographical errors were corrected; unbalanced quotation marks were remedied when the change was obvious, and otherwise left unbalanced. Illustrations in this eBook have been positioned between paragraphs and outside quotations. In versions of this eBook that support hyperlinks, the page references in the List of Illustrations lead to the corresponding illustrations. The first illustration is the cover. The index was not checked for proper alphabetization or correct page references. Footnotes, originally at the bottoms of the pages on which they were referenced, have been collected, sequentially renumbered, and placed at the end of the main text, just before the Index.