Right now you are in front of the dining table, turn left, you will find narrow opening, now go straight and turn left, you will find two open doors, enter into the open doors, and keep moving forward, on the left side, you will find stair case, now keep moving forward, and go near the right side of the stair case, there you will find two chairs, and a portrait on the wall on the right side, go and stand in between the two chairs, that will be your final destination.