Devil's Den Tavern

Your great-grandpappy has recently passed away. Unbeknownst to you, he wanted you to take over his very popular tavern and continue running it. Unfortunately, the medieval era in which he lived is a time when the local magistrate is a bit, uh, shall we say, corrupt. If the inheritor can’t find proof of ownership, the magistrate will undoubtedly try to take over the tavern for himself. Within the given time, you must use the clues and your creativity to locate the proof that you are the rightful owner of Devil’s Den Tavern.