You get it from the assassin quest. for the locations of the clues, or the locations of the assassins, there are several faqs to point you in the right direction. like the sticky'd thread at the top of the Fable:TLC board.
He-Man is Mattel. G.I. Joe is Hasbro. I don't have a magic colon. --OldAlchemist
Tried them, the ones that are left don't have the info on treasure clue 3. it is the only one I can never find. but I do know enough to know if you don't have them all, the hidden weapon won't be at full power.
I will defend all those who choose to run with me.