Making a compass

Robert

Well... hum... In order to make a compass, I need some small pieces of lodestone. Unfortunately, I'm currently out of stock, and traveling to get more would be too difficult for my old legs. So... I... You see, north of the plains, near the mountains, you'll find a deserted quarry, which was used a long time ago to build the guards' watchtower. Lodestone can be found in the area. Bring me back a small piece and I can make you a compass.