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

Simple typographical errors and unbalanced quotation marks were corrected.

To make this eBook easier to read, particularly on handheld devices, some images have been made relatively larger than in the original pamphlet, and centered, rather than offset to one side or the other; and some were placed a little earlier or later than in the original. Sidebars in the original have been repositioned between chapters and identified as “[Sidebar (page nn):”, where the page reference is to the original location in the source book. In the Plain Text version, the matching closing right bracket follows the last line of the Sidebar’s text and is on a separate line to make it more noticeable. In the HTML versions, that bracket follows the colon, and each Sidebar is displayed within a box.

Page 16: “unleased” probably is a misprint for “unleashed”; “coming in take station” probably is a misprint for “coming in to take station”.

Page 31: “the forthcoming attack on of Japan” was printed that way.

Page 50 (originally on page 49): “which later what would be called” was printed that way.