This chapter didn’t exist in the initial draft of the book; I added it in revisions. I originally liked the idea of the characters happening upon Luthadel later in the book and having to piece together what happened to Penrod from the aftermath of his getting spiked.
Ultimately I decided to drop that in favor of showing this chapter in-scene. It was a tough choice, but knew I needed to show Marsh being active. I also had enough complaints from alpha readers about the lack of news from Luthadel that I realized showing this scene would work better. We are so attached to Luthadel as a city that it’s hard not to know what’s going on there. Plus, this choice allowed me to include some interesting things—such as talking about what Marsh and the other Inquisitors were doing with their time and showing another character getting spiked.
You may remember one of the spiking attempts on Elend earlier in this novel, right at the beginning. I flirted with putting more of these in, but decided that it would grow too obvious and too heavy-handed if I emphasized it that much. (The scene I toyed with included a madman unexpectedly rushing Elend with a spike.)
I think this is the last of the Marsh insert chapters, meaning others you read after this were in the first draft. You’ll probably notice a larger gap before seeing him again. Marsh and TenSoon kind of get lost in this third quarter of the book, I’m afraid. We still see them, but it’s infrequently enough that Spook/Sazed and Vin/Elend dominate.