WALTER F. MURPHY taught constitutional law to generations of students at Princeton, where he held the chair of McCormick Professor of Jurisprudence first occupied by Woodrow Wilson. Born in Charleston, South Carolina, Murphy served as a Marine in Korea and won a Distinguished Service Cross and a Purple Heart, eventually retiring with the rank of colonel. He graduated from Notre Dame and George Washington University and earned a PhD in political science from the University of Chicago. His novels include 'The Roman Enigma' and 'Upon This Rock: The Life of St. Peter.'