Had a sweet tempo swing with my 8 iron. Hit the green to the right of the flag and bounced slightly left. lost sight of the ball. My playing partner in the foursome hit his tee shot within 10' of the pin. The other two in the group had shots on the left fringe and the other in the front right trap. As I walked up to the raised green I did not see my ball. It wasn't in the back trap so it must have rolled off the back into the high rough. I thought. Until Harold (the guy 10' away) informed me that I should look in the cup.