<span class='standouttext'>Spoiler : </span><span class='spoiler'> if you go down the screen utill you ge to a corridor that is blocked because when you pull the lever a door shuts in front of you. Split your charicers and have 1 open the way for the other. carry on along this corridor and out into a long room. open the locked door below you by making the room darker. prepare to meet a monster </span>
At least I tried dammit! At least I did that much.
The door behind which the monster remains is far to the east. Look for a large room containing "Elven bookshelves," then seek a locked door on the southern portion of its western wall. The only way to get in is to extinguish the torch, nearby.