Footnote
Reading edition
Most page numbers related to the illustrations have been removed in this etext, and the list of illustrations has had the page numbers adjusted to those pages which carry page numbers in the printed book.
Lastly, the filenames of the illustrations are based on their original but unprinted page numbering in the book. E.g. an illustration named “p47.jpg” would be where page 47 of the printed book should be.—DP.