Several of my listings of the top nine-hole courses have recently added another nine and thus forfeited their position. The two best: Rolling Rock Club in Ligonier, PA [Brian Silva adding nine to Donald Ross], and Harrison Hills in Attica, IN [Tim Liddy adding to Langford and Moreau].Rolling Rock was wonderful -- some of Ross' wildest greens ever -- but they were threatening to make a rule that you had to play the new nine first, because many of the members just wanted to play the original nine.Prairie Dunes started as nine holes, too -- and they're the best nine holes on the final 18. [That's 1, 2, 6, 7, 8, 9, 10, 17 and 18.]Whitinsville is terrific. The first hole is a great three-shot opener, the 2nd and 7th are excellent par threes, and the finisher is one of the great holes in golf. Two par-fours across the street, 3 and 4, aren't quite up to the rest, or it might even rate better than Royal Worlington & Newmarket.