The final illustration is a detailed map of north-eastern France. A large version of it may be found in the materials for this eBook at /.

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

Simple typographical errors were corrected; occasional unbalanced quotation marks retained. Some multi-paragraph quotations did not use opening quotation marks for the inner paragraphs, while others did. That inconsistent style was retained here.

Ambiguous hyphens at the ends of lines were retained.