Queen Charlotte was the wife of George III and, like him, of German descent. But did she also have African ancestry? Queen Charlotte died nearly two centuries ago but is still celebrated in her namesake American city. When you drive from the airport in North Carolina, you can't miss the monumental bronze sculpture of the woman said to be Britain's first black queen, dramatically bent backwards as if blown by a jet engine. Downtown, there is another prominent sculpture of Queen Charlotte, in which she's walking with two dogs as if out for a stroll in 21st-century America. Street after...