Newly elected president George Washington set out to visit the new nation aware that he was the singular unifying figure in America. The journey's finale was the Southern Tour, begun in March 1791. The long and arduous trek from the capital, Philadelphia, passed through seven states and the future Washington, D.C. But the focus was on Virginia, the Carolinas and Georgia. The president kept a rigorous schedule, enduring rugged roads and hazardous water...