With Evaro advancing in the front, Torviruv gets behind him, and Huseina behind him before everyone else falls in behind, so as to provide light to the half-giant.

No sooner do you get into the tunnel than there is a patch of scorched ground by an alcove. Some 30-35' farther in, there is is a much larger area of scorched ground in the cave. The group discusses what this could mean with each other, and given that the scorch marks are relatively fresh, it seems that a medium-sized undead was destroyed on the first spot, and a larger undead was destroyed farther in.

Finally, the narrow, natural passageway opens up to a cavern. This long cave stinks of rotten meat. The source of the horrific smell is readily apparent—a swath of carcasses is strewn about the floor of this place.

A two-minute search of this area doesn't reveal anything here, other than the fact - a clue itself, perhaps - that the bones were recently overturned and picked through in the past few days themselves.

There is no apparent egress other than an extremely tight well shaft.