Instructions
Complete the "Bounty Hunt" quest. You will get the first clue as a reward.
Complete the "Lost Traders" quest, which will earn you the second clue.
Undertake the "Assassin Attacks" quest and kill the last assassin, who will drop the third clue.
Get the fourth clue by participating in the Knothole Glade Archery Competition.
Go to Orchard Farm and head to the west side, where you will find a chest, which contains the fifth clue.
Look behind the mill on Windmill Hill for a chest. The sixth and final clue is inside.
Go back to Orchard Farm and dig between the hay piles and the barn until you get a message informing you that you have discovered the treasure, which is the frying pan. Because you have found it the correct way, it will be a usable weapon with a damage stat and augmentation slots.