Leave the camp heading northwest. The table you are looking for can be found at coordinates 5406, 5037. Use the Armor Sliver while standing next to the table to start the event. Trolls will start attacking your attempting to get at the box. You must kill four of them, but don't worry they spawn slowly giving you ample time to kill one before another is upon you. After the four have been slain return to Lyndon Kassel for your reward.