There's a list of things I planned to correct during this revision, but in Chapter 5 I stumbled upon some problems I had not expected. Correcting those problems required more work than all of the previous revisions to the previous four chapters, and included many new edits to the previous four chapters.
It was another case of me attempting to be vague with the reader, but falling into the trap of being vague with myself too. Even if some things are kept hidden or unclear, they should not be hidden or unclear to the author himself. Undoing the damage this caused resulted in the complete rewrite (not just deleting a few lines and adding a few) of two sections in chapter 5, the creation of a totally new one in chapter 4, heavy changes to a few others in both 5 and 4, and a dozen of small changes to sections going as far back as chapter 3. In the end some stuff I liked had to be thrown out, and the new stuff is not necessarily more entertaining, but now it all actually makes sense and has a logical flow of events.
What more can I say? Simply that Ghost gets a bit more backstory now than he did before.