1. Silently corrected obvious typographical errors and variations in
spelling.
2. Retained archaic, non-standard, and uncertain spellings as printed.
3. Re-indexed footnotes using numbers and collected together at the end
of the last chapter.
4. Enclosed italics font in _underscores_.
5. Enclosed sans-serif bold font in equals.
6. Denoted superscripts 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}.