"Tar? Razh, you should take some. With tar at the extremity of the wood, we just need something to light up the tar, and we have torch. You might put some in reserve in the scrollcase." suggest Rinaldo.
"A little closer to seeing, then," Eanos says as Razh gathers the tar and wood. "Shall we continue, or do we try down another corridor? Any ideas what would be leaving a tar behind it?"
The sound does not appear to be getting closer. The party proceeds. As the characters progress, they detect a bitter, rotting smell which becomes stronger as they approach. They also hear scuttling and clicking noises.