Woodborne Hall was built to withstand a seige and the only way to reach Lord Woodborne is to ascend a ramp to the upper level. The ramp is not there when you enter, and you must pull 4 levers to cause each section of the ramp to appear. The doorway to the upper level opens only after you have put the last section of the ramp in place. Take the first door on your left after entering Woodborne Hall, ride the elevator down and quickly get off at the first opening. Go straight down the hall and through a door into a small room. Open the door on the north wall of the room and pull the lever that's on the wall. This makes the first section of the ramp appear.

Now go back to the elevator and travel to the bottom of the shaft, travel north then west to a room with 2 levers on the rear wall. Pull the lever on the left (the right lever opens a secret door in the room where enemies are waiting). Now go back up to the top of the elevator shaft, cross the entrance hall and go through the door that's to the right of the entrance. Ride the elevator to the top of the shaft, go north at the "T", and pull the torch on the right. A secret door will open, and at the end of the short corridor, pull the lever that is on the wall. Now ride the elevator down to the next level and get off, travel west until you come to a torch on the right wall, and pull it. A door will open just to the right of the torch and reveal a secret room with a lever inside. Pull the lever and ride the elevator back to the bottom of the shaft (in my game the elevator doesn't work properly and you may need to cast levitate or slow falling to descend from the top level).

The ramp is now complete and you can walk up to the upper level entrance. Just follow the left wall of the maze and you will eventually come to Lord Woodborne's chambers. Kill Lord Woodborne, and King Lysandus' spirit will be put to rest. Alternatively, you may search for Lord Woodborne's diary, where he has written of his foul deeds. The discovery of this diary will cause Lord Woodborne to be exposed to public shame, and this will avenge King Lysandus also.