Diablo 1 Walkthrough -> Ogden's Sign
One of the last nights, they stole the tavern sign, and Ogden can't figure out why they needed it. In any case, he'll ask you to return the sign if possible, so as not to have to spend money on a new one.
On the 4th level of the dungeons, look for the passage to the 5th level. It will be surrounded by walls and bars, which are directly related to our quest. First, you'll need to enter the southern entrance and speak with the demon Snotspill. He'll tell you that the "magic" (read: the sign) is guarded by some big guys, and he wants you to take it from him.
Next, head to the northern entrance, where the "big guys" you're looking for—the demon overseers—live. They guard a chest containing the sign.
In the second case, when you return back to the level, you will still have to fight Snotspill and his gang, who separate you from the stairs to level 5, but you will have a reward.
See also:
Diablo 1: The Curse of King Leoric