Wren doesn't see a trap, but she does happen to find what look like humanoid footprints in the muck and grime covering the walkways, near the dead rats. She has a hard time hearing anything over the flowing of water, but unusual echoes of strange splashes through the pipes tells her that something may be traveling under the water, or at least partially under the water.<br/><br/>{Anybody want to make a Knowledge(Nature) check concerning the rats?}