—Silently corrected a few typos.
—Retained publication information from the printed edition: this eBook
is public-domain in the country of publication.
—Included a musical transcription, playable MIDI, printable PDF, and a
variant text of the Drummer Boy song.
—In song texts, repeated phrases are delimited by |: and :|.
—In the text versions only, text in italics is delimited by
_underscores_.