Turn left and go straight past the stairs. Continue down the hallway and go into the last door on the right. Wait at the entrance.
Walk forward and turn left passing the staircase. Walk all the way forward passing all the picture frames on the right. Turn right towards the room in the corner, and stop there.
Walk forward with the staircase to your left. Make a left at the door with the staircase still to your left. Walk down the hallway and into the double doorway on the right.