(Repeated as reminder since it was a couple pages ago:)
Enough light from outside comes through the hole in the ceiling of this room to see fairly well. This chamber has partially collapsed: tall stone slabs that once supported the ceiling are now canted inward by the weight of the earth above and fallen debris is piled in the center of the room. It seems as if the entire chamber could collapse with the slightest disturbance.
In the rubble, barely visible, is the corner of what looks like a large stone chest..
When they entered the chamber Cedric started carefully poking around the rubble that was collapsed over top of the stone chest. The light coming from above was growing a bit dim and he realized it was later in the day than he had thought, but he wasn't ready to call it quits just yet. "What do you think? If we can move some of this off the top, maybe we can get it open?" Already he was picking up a few rocks and moving them out of the way.