T9.1

Distant murmurs from unknown creatures deeper in the caverns can be heard.

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 perhaps a medium creature to crawl through.

From K6
''You poke your head out and peer into a tunnel. To your left the tunnel curves out of sight, to your right a strong putrid smell fills the air.''

From R9
The stench from the waste room recedes as you walk along this curving tunnel.

From R16
You enter a curving tunnel, the air becomes increasingly smelly as you walk along.