 Charlotte 's death set off tremendous mourning among the British , who had seen her as a sign of hope and a contrast both to her unpopular father and to her grandfather , whom they deemed mad . As she had been King George III 's only legitimate grandchild , there was considerable pressure on the King 's unmarried sons to find wives . King George III 's fourth son , Edward , Duke of Kent , fathered the eventual heir , Victoria , who was born 18 months after Charlotte 's death . 
