I just went to look at Chapter 48, and evidently when I redrew chapters I took all the material that had been in Chapter 48 into some other chapter and failed to notice it. So the tally should stand:
Chapters not yet begun: 48, 52.
That's it. Did 54 this morning. May not finish any more chapters today. I keep repeating to myself, "That's okay, that's okay, that's okay," but the brain is not so sure.