Ultima Underworld 1 Maps, page 2
Level 5 Home of the Ghouls and a few Seers. This is a mightily confusing level to be honest. It's also the first level to feature lava. Other features include the tombs of Garamon and Sir Cabirus, the brokenhearted mage Judy, the mines of zanium and a lot of undead to kill or run away from.
Level 6 Home of the Seers. Lots of lava on this level. Hope you got the Dragon-skin boots! Features here include the Golem, the pit, the key-shaped room across the lava chasm from the hourglass room, an upset spectre named "Warren" (tip of the hat to Warren Spector). Pretty confusing place, especially the north-east area.
Level 7 Home of Tyball and his mana-killing orb. You cannot cast magic here until the mana-draining orb is destroyed. Other features include the hidden tombs area, Kallistan the Mountainman, the killer maze to get to Tyball, the lava chasm with all the elementals, dread spiders, Arial, Tyball's secure prison. Lots of things to kill on this level.
Level 8 Home of the Chamber of Virtue. This is the heart of the Great Stygian Abyss. Lots of annoying lava and monsters. Features here include Garamon's Bones, Carasso, the Slasher of Veils and the wisp that'll teach you the spell Armageddon. The dragon-skin boots here come in handy for sure.
Return to the UW1 Xerogram.