Transcriber's Note:The index has been moved from the beginning of the book to the end for the reader's convenience.In the original book, there were two or three illustrations on each page. The illustrations have been enlarged and there is now one illustration on each page. The page numbers have been adjusted accordingly, for example the illustrations on page 102 are now on pages 102a, 102b and 102c.The punctuation and spelling in the text are as printed in the original publication.