Edward Jenner more lives than the work of any other human". In Jenner’s time, smallpox killed around 10 percent of the population, with the number as high as 20 percent in towns and cities where infection spread more easily. In 1821 he was appointed physician extraordinary to King George IV, and was also made mayor of Berkeley and justice of the peace. A member of the Royal Society, in the field of zoology he was the first person to describe the brood parasitism of the cuckoo. In 2002, Jenner was named in the BBC's list of the "100 Greatest Britons". Edward Anthony
Frank Jenner into his home for tea and told him about the gospel. Jenner converted to Christianity and, when he went home, told Jessie that she was a sinner bound for hell and therefore in need of salvation. According to Wilson's biography of Jenner, Jessie thought that Jenner had become manic or insane. They had a young daughter named Ann by this point and Jenner was gambling so much that he was not providing for his family. For both of these reasons, Jessie left Jenner and moved to Corowa to work on a farm, taking Ann with her. She said that she