1. Silently corrected typographical errors and variations in spelling.
2. Archaic, non-standard, and uncertain spellings retained as printed.
3. Footnotes have been re-indexed using numbers and collected together
at the end of the last chapter.
4. Enclosed italics font in _underscores_.
5. Enclosed bold font in =equals=.
6. Superscripts are denoted by a caret before a single superscript
character or a series of superscripted characters enclosed in
curly braces, e.g. M^r. or M^{ister}.