Andrew Makepeace Ladd III wrote his first letter to Melissa Gardner to tell her she looked like a lost princess. They were both seven years old. For the next fifty years, through personal triumphs and despair, through wars and marriages and children and careers, they poured out the secrets of their hearts to each other. They defied a fate that schemed to keep them apart and lived—through letters—or the one most meaningful thing, their undying love for each other..