Transcriber's note

In the HTML version some of the illustrationshave been moved beside the relevant section of the text.Page numbers in the List of Illustrations reflect the position of the illustrationin the original text, but links link to current position of illustrations.

Minor punctuation errors have been changed without notice. A printererror has been changed, and it is indicated witha mouse-hoverand listed at theend of this book. All otherinconsistencies are as in the original.