Transcriber's Notes
In this Plain Text version of the e-book, symbols from the ASCII and Latin-1 character sets only are used. The following substitutions are made for other symbols in the text:
Footnotes are numbered in sequence throughout the book, and presented at the end of the relevant chapter. Illustrations have been repositioned closer to references in the text.
Inconsistent spellings and hyphenation have been retained as in the original. With the exception of minor corrections to format or punctuation, no changes to the text have been made.
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Edited by A. W. Pollard