From September 1938: With the announcement of Clark Gable as Rhett Butler and Norma Shearer as Scarlett in “Gone with the Wind”, Clark and Norma, far from happy, are wearing two worried frowns on their personable faces. Gable is anxious to know these things: “Will I be the Rhett Butler of the fans’ dreams? If please the North, will the South be happy over the choice? Will I interpret each scene, each move, as the millions of readers have pictured it in their minds and hearts? Will I fail in this, my heaviest assignment to date? Frankly, I don’t see how any actor can win with this role and I’m…