Two and a half million Americans - fifty-five million people worldwide - stutter. Though their baffling malady has been subjected to endless analysis for over 2,500 years, most endure it without hope of a cure. The very anticipation of stuttering can dominate a victim's social and emotional life. If the majority suffer in anonymity, famous figures down through the ages - Moses, Charles I, Lewis Carroll, Henry James, W. Somerset Maugham, Winston Churchill,...