I finally finished chapter 19 ("Rough Justice") yesterday. Part of this involved moving the last section of chapter 18 into 19, as 18 was really too long. That essentially bumped part of the planned material for chapter 19 into chapter 20 ("The Largest Stones"), which I started this morning. These things happen!
When I write a chapter, or indeed a scene in one, I try to write it without trying to get everything right (no pun intended). Then I go back over it once or twice to make adjustments where needed and polish the wording, adding more descriptions where needed. This of course will be repeated for the whole manuscript after I finish the first draft, and may be more necessary than usual because of the several interruptions in writing it.
Main references this last week: