In the rolling hills of Louisiana's Felicianas, less than an hour north of Baton Rouge on the east bank of the Mississippi River, lies the historic community of St. Francisville. For generations, this picturesque town has inspired a variety of creative artists, from naturalist John James Audubon, whose experiences in the area helped make him the world's greatest bird artist, to acclaimed novelist Katherine Anne Porter, who wrote one of her best travelogues,...