Go to the Indian Hunter's hut, which you can find on your map. Then, go to the building to the left of the hut, with the stairs going up the side. Go up the first set of stairs, and continue going straight. You should see a spout-type object coming out of the side of the building. Jump onto that spout, and walk toward the wall of the building. If done correctly, you should go through the wall, and into the inside of the house. There is only a small ledge for you to drop onto inside, so move slowly. When inside, look to your left and you should see three whiskey bottles on the ground. You can pick these up as many times as desired and they will never go away.