Italic text is indicated with _underscores_, bold text with =equals=. Small/mixed capitals have been replaced with ALL CAPITALS. Evident typographical and punctuation errors have been corrected silently. Inconsistent spelling/hyphenation has been normalised. A half-title page has been discarded. Internal references treated as footnotes have been inserted into the text. Remaining footnotes have been relocated to the end of the text. To improve text flow, illustrations have been relocated between paragraphs. Page numbers in the list of illustrations have been discarded. New original cover art included with this eBook is granted to the public domain.