Larian Studios Forums Divinity - Original Sin Divinity Original Sin - Help/Tips/Tricks Infiltrating the Immaculates - Hidden Village

Stuck on this quest:

I'm to look for "evidence of source" in the Hidden Immaculate Village.

I've talked to every NPC (I believe), been all over town, behind the waterfall, in the jail etc. Nothing seems to update this quest. Anyone able to offer some assistance?