T.2.2

Searching the Walls
Perception DC 25 +1/10': You see a small crevice in the wall here, it looks like something burrowed it, it's only large enough for a small creature to crouch in, or a medium creature to crawl through.

From K4
You poke your head out from the tunnel, to your left the walls glisten with moisture and the air is warm. To your right, a putrid smell floats down the hall on a cool air.

From R2
As you leave the room of refuse, the smell starts to dissipate, the air becomes warmer, and the walls glisten with moisture.

From R6
''As you leave the spring, the walls glisten with moisture, though it dries as you walk along. The air becomes cooler and begins to smell rank.''