Guiding Beacon Quest
You can pick up this quest after you visit Bartholomew during the Nature of the Beast quest. Return to the Lone House location, head down to the lab and save a man from the trolls. Loot their bodies to find a silver thingy and begin the quest. Either keep the whip to yourself by telling Bartholomew about it (or lying about not finding the item) or return the item to its owner, who will reward you with 1500 coins and 375 experience. The quest is completed.