Thanks for the suggestions, Trippy. Unfortunately, there is no sigil to be found in my inventory and the main quest screen clearly shows this part as incomplete (different color than the other three, which I've finished).
Do loot bags remain in one place if you zone out and then back in ?
This is a pretty major oversight, IMO, ruining the game experience for someone this far along in the game. I will eventually start over as a different class, but right now I'm too pissed to do that.
