Transcriber's notes:
Page numbers in this book are indicated by numbers enclosed in curly braces, e.g. {99}, in the left margin. They have been located where page breaks occurred in the original book. For its Index, a page number has been placed only at the start of that section.
The page numbers in the List of Illustrations are those in the original book. However, in this e-book, to avoid the splitting of paragraphs, the illustrations may have been moved one (or more) pages preceding or following.]
In the original book, each illustration was on its own leaf, prefaced by a separate onion-skin leaf containing the description of that illustration. In the HTML version of this e-book, each pair of illustrations and descriptions is set off from the text with horizontal rules.
The original book did not have a Table of Contents. One has been added for convenience.
