So What Have We Found Out So Far?

Ghosts have been disappearing into the Black Chase, after grave desecrations in Sijan and turning up either pale and without purpose, or not turning up at all
There was a censer (now destroyed) at the entrance to a portal to the Labyrinth, made by the nephwrack known as Four Seals Broken, at a point in the Labyrinth about 1 mile east of the portal: Lost Butterfly Maiden destroyed the censer
The ghosts have lost their fetters, but Cathak Gaius Gan Ning attempted to give them purpose by recruiting them