|Unmarked Quest: Break up the bar brawl|
|Finish Evict the widow quest.|
|Go to the Malamute Saloon and talk to Bette and Caminetto.|
|Break up the fight.|
|Report to the Sheriff.|
|Reward: 1500 XP, $300|
|Next quest: Find out who cut the whore|
The second assignment from Sheriff Marion, right after dealing with poor widow Rooney, is to break up a bar brawl in the Malamute Saloon instigated by two miners from LeBarge's and McGrew's mines. Upon arriving you will find two workers (Blasphemous Bette and Caminetto) having a go at it. You can stand and listen to them for a bit (nothing happens if you don't take immediate action), but sooner or later you'll have to break it up.
Talk to both Caminetto and Blasphemous Bette and ask them to stop for the sake of Sheriff Marion's bum leg. Whatever you do, don't provoke them into a fight - it's bad mojo and the town goes ballistic. If you manage to convince them both to step back both parties will drop the attitude, which is the best possible solution. Jailing none is the only way to get idolized.
Then, return to Sheriff Marion afterwards.