That was quite straightforward. After the effort of inserting material for a new Chapter 5, and heavily revising it, I can hardly believe that I've spent an evening on Chapter 6 and can consider it revised. To be brutally honest, it's a perfectly sound and worthy chapter, but it wasn't as much fun as its predecessor. Minstrels and metaphors are more engaging than commentary on commentaries!
Anyway, that makes me 209 pages down, 104 to go. Exactly two-thirds of the way through.