Thief Side Mission: Beauty Within

Travel until you are just outside the window. Look up, and use focus if you need to. There is a beam that you need to shoot with a rope arrow. Climb up, hop onto the ledge, and open the window. Once inside, there are two people. One doesn't seem to wake up no matter what you do. The other is already awake, so either sneak, snipe, or fight.

Loot everything, and then go downstairs. Loot everything again, and then examine the painting by the window. Examine it, and pull the switches to move it. The combination to the safe is 8 2 4. Grab what's inside, and the mission is over.