There is no treasure to be found here. All you see is filth. Dirty murky water and fumes rising from it burns your eyes. You see animals roaming around. Are they small dogs? No they are rodents, big rats. They glisten with the filth they are covered with. It is dark and difficult to see much else.
sewer entrance, Inside Tower
a rat chews on a dropped hymnbook
spider
I am a spider. I am large, black, and have eight hairy legs. I wait to trap insects in my web. I enjoy eating unwary prey. I live in a darkened wood near a remote village.
A rat down here in the sewers? I can't say I'm surprised. This book is delicious. It certainly looks the part.  Would you like some? I'm quite alright with the catches that I've made, thank you. More for me. Go ahead. So why are you eating a book down here and not some... sewage?  This helps me be closer to God. By eating this book here? How do you figure? It's not even food! I'm a rat. It's not like I can read the book. I may as well eat the book. Well give it to me instead, I can read it! How do I know you won't eat it all?