Anne Hamilton-Byrne wore pearls and Chanel perfume. She played the harp and sang soprano. She had blonde hair, styled in waves that caught the light. As leader of The Family, the Australian doomsday cult she founded in the 1960s, she claimed to be Jesus reborn as a woman. Much of her power, say her former followers, lay in her grey-blue eyes. “In ancient times we hear about enchantresses who...