For this quest you will need a Friend to help.
You: HUNT the officer of the law. ASK OFFICER BUSHRANGER -> he'll prattle on, ASK OFFICER VOLUNTEER -> he will tell you to get a friend.
Your Friend: ASK OFFICER FRIEND -> the officer will prattle on, SAY YES -> the officer will instruct your Friend and give him 1000 gp.
You: ASK OFFICER INSTRUCTIONS -> he will tell you. Find Ben Jamieson, ASK JAMIESON JOIN -> he will ask you to bring him the quill pen of Redmond Barry, HUNT & KILL BARRY (he is tough), GET KEY CORPSE, go to Barry's office, UNLOCK DESK, OPEN DESK, GET PEN DESK, find and RIDE a horse, GIVE PEN JAMIESON, FOLLOW JAMIESON.
Your friend: must remove and bag his weapon, walk into the room with the gang (they only rob around dawn and dusk) -> after several tries, the bandits will hold up your Friend, GIVE 1000 COINS JAMIESON, go to the Lucky Nugget.
You: ASK JAMIESON DRINKS -> Jamieson follows you, go to the Lucky Nugget -> the officer will be waiting in the Lucky Nugget where he will arrest Ben Jamieson and his gang,
credit: <a href="http://www.legenddb.com">legenddb</a>