Here you go, the beginning of Chapter 4!
Here’s the rest of chapter 3! My apologies for the delay: I’ve been distracted by wrapping my brain around interactive fiction.
The earlier bit of chapter 3 is here.
Still in need of rewrites, as per the rest of this material. I’ve fought off the temptation to edit before I post this, beyond pulling out the material I’d already struck-through back in April.
The preceding chapter starts here, and continues here and here.