I still have my original paperback.
I also have the book from the kindle store. In the paperback, Part 7 has two columns on each page representing the left and right pages of a notebook where someone filled out the right hand pages and went back and wrote in the left hand pages (or perhaps it was a different person on the left).
The digital book has the contents of one column followed by the second column in a different font and separated by horizontal rules.
The ebook doesn't really explain this (it's fairly obvious in the paperback) but that's what it's supposed to represent.
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