I went through the door that had a lever, then another lever and walked through the whole area but encountered a locked door through there with no key that I can see. Sigh.... Im talking about another door, down by the room with a table full of manuscripts. That door says it isnt openable by any key.
Anyway, now Im running into another problem. On the level with the teleporter out, Ive come to a door with a lever next to it. The lever opens the second door but the first stays locked. These doors are near the torch puzzle. (2 torches shine bright but you still cannot see). Ive cleared out this wholoe area and havent seen any keys. Even with Alt on...
