Transcriber's Notes:
1. Minor changes have been made to correct typesetters' errors and to ensure consistent spelling and punctuation in this etext; otherwise, every effort has been made to remain true to the original book.
2. The sidenotes used in this text were originally published as banners in the page headers, and have been moved to the relevant paragraph for the reader's convenience.
3. Some page numbers have been repostitioned from the original text, to accommodate the placement of illustrations in this e-text.