Punctuation, hyphenation, and spelling were made consistent when a predominant preference was found in the original book; otherwise they were not changed.

Simple typographical errors were corrected; unbalanced quotation marks were remedied when the change was obvious, and otherwise left unbalanced.

Text uses both Mackenzie and M^cKenzie.

The running headers of the original book included dates. In this eBook, those dates appear in parentheses, next to the Section headings.