You'll need to go to the North East (71,16) for the key. After killing Zaeldarr and looting his head, don't forget to click on the scroll lying on the floor, this gives you the quest Hameya's Plea. Not a difficult fight as long as you manage to pull the two at the front before you aggro Zaeldarr and his minder, but be prepared to kill two lvl 55s at the same time. I was 60 when I did it so pull range wasn't a problem. I guess all of this will depend on your level and pull range. Zaeldarr is lvl 55, the others will be random 53-55s. When you get to the bottom you should then be able to pull the two nearest mobs as a pair, leaving Zaeldarr and the one standing in front of him. You can take out the 3 on the stairs one at a time. In other words, if you didn't want characters doing soul searching but wanted an offbeat story with less depth, you may be disappointed.
Unless someone has already cleared it you'll probably find 3 mobs on the stairs down and another 3 waiting for you down at the bottom with Zaeldarr. The Museum of Forgotten Memories from Anstey Harris is less a quirky novel than it is a surprisingly deep novel taking place at a quirky place. Overground area is surrounded by level 53 to 55 undead. Comment by KysumuThis guy is underground at The Undercroft.