Punctuation and spacing “A.B.C.” has been used for all occurrences.
Full stops or commas have been added where omitted at the ends of lines.
In The Absurd A.B.C., the positions of the apostrophes have been corrected in “Full many a long day’s rabbit skin hunting” and “went up to sweep ’em”
The illustration immediately following The Absurd A.B.C. (page 64), a poster of the letters A to M, was omitted from the original images on the Internet Archive. It has been obtained from a separately published version of The Absurd A.B.C. at Project Gutenberg.