Ralph Waldo Emerson, Mark Twain, Henry James, Sigmund Freud, and Charlie Chaplin all doubted that William Shakespeare of Stratford-on-Avon was the true author of the dramatic masterpieces that bear his name. Correspondent Al Austin investigates the latest controversial theory that Edward de Vere, the 17th Earl of Oxford, a poet and intimate of Queen Elizabeth 1, was the real Shakespeare.