Facing the window with the dark curtains, turn 180 degrees. You will see a table to the left, walk to the opposite end of the table towards the door that's open with the arch. Walk under the open doorway with the circular arch top. Continue through the hallway through the next arch onto a blue carpet, which has a circular table in the middle without any chairs. Stay to the left of the table and walk to the left towards the staircase. Staying on the left side of the carpet, you'll see on your left two chairs plus a wooden bench and a stairway going down the right and left side. Stay to the left of the left hand side and walk towards the open archway. Standing in the left, archway, where you're facing a window, the archway is on your left, and the railing to go downstairs is on your right, then you're done.