Start facing a window and a small table. Turn around and head through the arch way on your left. You'll see another set of 3 archways in front of you. Head through the one on the left. When you get to the end of it you'll see a mirror. Turn left before the mirror heading down another corridor. You'll see a long skinny hallway with a carpet. Head down that hallway into the room at the end of the hallway. Once you're in that room take a right and descend the staircase. Once you hit the door leading outside at the bottom you've arrived.