You are standing on the middle of the middle of the staircase, facing towards the wall, turn back, climb down the staircase. Now turn left, you can see an open door, walk to the open door, enter the room, to the left you can see an open door, walk to the open door, turn left, in-front of you you can see portrait, beside portrait there is a wooden chair, walk to the chair and stand in-front of the portrait. That's your end point.