Simple typographical errors were corrected; unbalanced quotation marks were remedied when the change was obvious, and otherwise left unbalanced.
Illustrations in this eBook have been positioned between paragraphs and outside quotations. In versions of this eBook that support hyperlinks, the page references in the List of Illustrations lead to the corresponding illustrations.
The table on [page 175] was printed in a way that was difficult to understand, so its appearance in this eBook may be incorrect.
[Page 249]: “we reached the N 24” was printed that way, but the narrative suggests that it should be “N 25”.