walk down the stair. turn right. walk towards the statue and go down the stairs. walk toward the stained glass windows. keep walking down the staircase. walk to the hanging light.
First walk down 2 stairs. Stop and after turn to your right 90 degrees. Walk forward until you get to the bookshelf then turn 90 degrees to your right. Walk straight and then after the bust turn to the right 90 degrees once more before descending down the stairs.
Turn right and go down the stairs. Then turn right and go down the stairs stopping on the stairs near the window.