The one footnote has been moved to the end of its chapter.

Illustrations have been moved to paragraph breaks near where they are mentioned.

Variations in spelling, punctuation, and hyphenation were retained as they appear in the original publication, except that obvious typographical errors have been corrected.

p. 137: 1910 in the original publication, which cannot be correct based on the context (in 1910, when)

p. 193: Poem is an extract from Henry Wadsworth Longfellow’s “Morituri Salutamus.”