Good find Vince. I did not dig far enough to find that. To summarize what I have gleaned:
- Daughter describes some discrepancies about compass directions that don't make sense, she made changes in a couple of places. I do not see these bracketed.
- Daughter added some interpolation in chapter 64 to explain how the women get from the west side of the flood to the east side. These additions are in brackets, as stated by the daughter.
- The sentence in chapter 9 "and it were not amiss..." is not missing, it appears before the last sentence in the paragraph, and was later moved to the end of the paragraph.
- Nothing is said about the unwritten song.
- Daughter states "...I am bound to follow my own instinct in the matter, and to present the text of the posthumous work with any such necessary corrections properly indicated." Which implies the brackets without saying explicitly. As mentioned, this was only done starting with the 4th printing.
Lots of interesting background, I'll include something in the long description.