William Shakespeare died in pain of a rare form of cancer that deformed his left eye, according to a German academic who claims to have discovered the disease in four genuine portraits of the world's most famous playwright. As London's National Portrait Gallery prepares to reveal in a show next week that only one out of six portraits of the Bard may be his exact likeness, Hildegard Hammerschmidt-Hummel, from the University of Mainz, provided forensic evidence that there are at least four contemporary portraits of Shakespeare. Hammerschmidt-Hummel, who will publish in April the results of her 10-year research in "The...