While playing at a local Private Club invited by friends, i was fortunate to sink my second HOI. Playing in a threesome, i hit a 6 iron to a front pin on a 182 yard hole. Noe of us saw the ball drop in the hole due to the base of the cup hidden by a small mound. Upon getting to the green, i began walking towards a ball on the green when a playing partner stated that it was his ball. I then figured that i had come up short, returned to the cart and grabbed a wedge and began to search for the ball short of the green either in a trap or an up slope to the green. As i continued to search, the other member of my group walked back to the hole, which i walked by 3 times and exclaimed, "it's in the hole!"