1. The Errata was corrected. 2. Silently corrected obvious typographical errors and variations in spelling. 3. Retained archaic, non-standard, and uncertain spellings as printed. 4. Re-indexed footnotes using numbers and collected together at the end of the last chapter. 5. Enclosed italics font in _underscores_. 6. Denoted superscripts by a caret before a single superscript character, e.g. M^r.