Right now you're in a corridor where you can find an opened door in font of you. Move towards that opened door, turn around and you can see a staircase. Get down the stairs. Now turn left and you can find two portraits. Move towards that portraits, here you can find an opened room in front of you. Get into that room. Now you can find bed in front of you. Slightly turn left and move towards the wall. Stand in front of a candle holder which is on the wall beside the window and that is the end point.