I found this guide to ToFS, and it appears Classic Era. It lists the keyholders and mirrors.
http://eqrez.com/stormhaven/forums/v....php?f=12&t=22
"...[Tserrina] will drop a golden key that is the master key to the dungeon! Which will allow you to teleport straight to the top using the mirror on the left at the very beginning of the zone (instead of the one on the right that takes you to the library)"