From the two halves of the female you can gather up a magical mace and some sort of vial that contains some eldritch powder. Her magical chainmail is wrecked beyond hope. She also carries the holy symbol of some death god of the surfacers. The one near the well, who talked to the wraith, carried a dagger made of adamantine, a magical brooch and a ring, plus a few spell components.
Once Korach lets go of the halfling, he can be stripped of his magical (small) composite longbow, thrre potions, and a small armor made of studded leather. His cloak seems to have some eldritch properties as well.
You do find some sort of map near the table, depicting crude sketches of this place while others seem to have no relation to these halls whatsoever. From what you can discern, this looks to be the southern part of an extensive network of caverns and tunnels belonging to a dwarven mining settlement. Some of the old mines lie nearby, mines used for the burial of the dwarven dead. You cannot discern what these scavengers wanted here.