—Retained publication information from the printed edition: this eBook
is public-domain in the country of publication.
—Corrected a few palpable typos.
—Included a transcription of the text within some images.
—Renumbered footnotes, and modified references to them accordingly.
—In the text versions only, text in italics is delimited by
_underscores_.
—The HTML version contains relative hyperlinks to these companion
volumes, so that offline copies can be interlinked:
—Canyonlands National Park, Gutenberg eBook #51048,
—Arches National Park, Gutenberg eBook #51116.