The narrator (Robert Walton), in Mary Shelley's Frankenstein, is sailing to the North Pole in order to find the seat of magnetism. Robert Walton wants to find fame, and his ambition drives him to push forward into the frozen reaches of the North Pole.
In letter one, Walton tells his sister (Margaret) that he has made it north of London (in Petersburgh). As the letters continues, Walton comes into Archangel (Russia), and well into the North Ole surrounded by ice.
At the end of the story, after persuaded by Victor, Walton decides to head home (to England). No longer a slave to his ambition, Walton realizes that pushing forward into the north will only insure his death.