There are 16 gems in the wall, each worth 10 gp—all that remains of the glittering mosaics. The cube still holds a few undigested remains:
gold holy symbol of Iomedae worth 100 gp
a breastplate emblazoned with a bronze angel
two potions of bull’s strength
You move through the door to the east. Tiny, intricate carvings line the walls of this room, forming great columns of text. Much of it has cracked and crumbled, and the entire southern wall is fractured, with a yawning cavern beyond. The room itself is 20 by 30 feet and there is an old firepit an alcove to the east.
The carvings on the walls can be read with: Aklo, comprehend languages, DC 22 Linguistics check (+5 if you know Dwarven or Gnome).
The text records a history lavishly describing ascent from the darkness deep below and cowering from the great torch in the daytime sky above.
There is another section that describes opening a puzzle door to pray at the feet of something called the Excavator. This section reads "grandmother, in seeking the Excavator, turned her eyes to the Stone, and to the Steel, and finally to Woe.”