Start this mission by talking to Kieren at Horseshoe Overlook - he’s the guy tied up who you captured back during Old Friends. A cutscene will start where Dutch will interrupt you, and threaten to geld Kieren. He’ll talk after the threat of hot bolt cutters are aimed at him with his pants down, and tell you Colm O’Driscoll is held up at Six Point Cabin. You’ll then follow Kieren’s instructions to find Colm and his gang, up in Cumberland Forest. He’ll instruct you to leave your horses over the hill, and continue on foot. Remember to take the throwing knives from your saddlebag. Equip the throwing knives and use them to take out the three stragglers silently. After killing him though, a firefight will break out. Do your best to keep covered while fighting. After the remaining O’Driscolls run off, loot the bodies. Your buddies will tell you to search the house. Head to it after you’ve looted to your heart’s content. Trying to open the door will prompt a short cutscene - an O’Driscoll was behind the door, and he knocks you over. Kieren, surprisingly, comes to your rescue though. It turns out Colm isn’t here, making Arthur pretty irate with Kieren - but Bill and John convince him he’s not a threat. Kieren repays the kindness by telling you there’s cash in the chimney. Head inside and loot the house. There are a few stacks of money on the table, and a double and barreled shotgun above the fireplace. You’ll be prompted to clean it, increasing its stats.There’s $600 in the chimney - your share is $100. That’s the end of this mission.