(rough notes from email draft)
Entering the cave
Through long, very round tunnel
Scuttling swarm coming from smaller, orthogonal passage
Sealed door with light behind it
Study with desk and two skeletal animals tussling
Looks more worked, less natural
Anders is not noticed actively by any of the creatures so far
Two doors out from the study: one heavily locked, one slightly ajar with sounds of movement
Light also coming from farther in, and talking
The party (Oak?) announces its presence loudly, provoking attack. Swarms from in front and behind move toward the loud noises.
As the skeletal creatures die, some of their bones clatter off through the doors, pulled by some unseen force.