You can do a more simple thing with this damned drawbridge puzzle. Let the levers be and jump into the water pool. Swim to the north bridge (it's down now) and climb on it. Climb the chain (it's possible) near the north exit from the north bridge and enter the north part of the dungeon. Seek the lever control room there and click all three levers there. All parts of all bridges will go up! No more jumping! No more need of aspirin and coffee
