In BWS (stable) installation, BG1 quest mods are installed. One of them is called:
Ascalon's Quest Pack I: The Serpents of Abbathor Part 1
While I enjoy this mod on so many levels, I find that there are very few discussion of the mod.
When I was doing a walkthrough search, all links direct to German forum.
So now I ended the chapter with the quest item because I can't find the quest giver to return it.
If anyone help me find more information on this mod I would appreciate that.