A petty thief known as John Smith was arrested for fraudulent behavior in 1877. He tricked women into thinking he was rich, then stole their belongings and vanished. His guilt was obvious. In 1852, Adler and Adolf Beck's father died on an expedition to a glacier, and their lives separated. One became a respected climate scientist, one a successful opera singer touring the world. Or so he claimed. But both remained in touch, if only to share...