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.

The index was not checked for proper alphabetization or correct page references.

Page 215: “in his first essay” was misprinted as “in first his essay”; corrected here.