T4.1

The hallway ahead of you curves and bits of rock or bone litter the path.

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 from the small tunnel into another one. To your left you hear some scuttling noises, to your right a warm and foul stench fills the air.

From R4
''You leave the large room where the kobolds scheme and enter a long tunnel. It becomes warmer as you go and a foul stench fills the air.''

From R9
The warmth and stench from the previous room recede as you walk along and you hear some scuttling noises from up ahead