--Retained publication information from the printed edition: this eBook
is public-domain in the country of publication.
--Corrected a few palpable typos.
--In the text versions only, text in italics is delimited by
_underscores_.
--Included a transcription of the text within some images.
--The “Notes” section (blank pages in the printed edition) illustrates
leaves collected and pressed by a prior owner of the book.