In the small town of Palmyra, Missouri, northwest of Hannibal (the hometown of Mark Twain), a historical property has taken on new life as Cole’s Hearth Room. Now an elevated American restaurant, the Hearth Room was a farmstead whose original barns and silo were built in 1846. During the Civil War, gurneys filled the halls of the main building so the home could function as a hospital. When the farm’s owners lost the home during the Great Depression, the adjacent Greenwood Cemetery developed it into a caretaker’s house. In 2006,…