Tony Jarvis may have been the most distinctive private school headmaster of the past half century, if not in the history of American schooling. He was for thirty years headmaster of Boston's Roxbury Latin School, the oldest school in continuous operation in the United States, founded in 1645 by the Puritan divine John Eliot, Apostle to the Indians. Roxbury Latin School today is a school of 300 boys in grades seven through twelve, and it is annually...