Zagyg Scroll Quest
From Merric's Greyhawk wiki
Yig Barthoni has hired the adventurers to recover a scroll from the Library of Castle Greyhawk.
There should be a number of scrolls in the back, right-hand room. He offers 500 gold pieces if all the scrolls are returned to him, and an additional 500 gold pieces if the scroll he wants is among them.
He gave each adventurer an advance of 20 gold pieces.
