I have been all over Shurugeon Castle and defeated the Demon, but I can't find any info on Galian for my priest quest. Getting tired of running all over the dungeon, Sewars and the rest of the castle. I want to put this area to rest. Can someone give me a spoiler here? Thanks.

Don't remember exactly where, but one of the room's treasure chests had a note from Galian detailing the first infestation of the undead. This is what the priest is looking for.