Under the stairs you find a small chamber and a trapdoor. Behind the trap door is another set of stairs. It looks like there were spots for candles to be placed along the walls, but they've long gone missing. The stairs spiral downwards some 40 feet.
Descending the stairs you come into a dark chamber, roughly as large as the stairwell room. The lanterns light crosses a number of decaying skeletons held in place by chains and shackles. They vary in size ranging from children to adults. A series of tables with scattered refuse, papers, and various vials, brushes, and more mechanical instruments can be seen.
At the opposite end of the room, shackled to the wall, is a waifish looking girl in tattered linen clothes. Around her head sits a bronze pot with a myriad of squid-like protrusions and eyes seemingly blinking and shifting in the darkness. She... and the pot... don't seem to react.