Grosvenor, Gilbert Hovey, 1875-1966. "The National Geographic Magazine Map of the North Pole Regions" (1907) Lithograph map, diameter of 44.4 cm., backed on linen. [Historic Maps Collection] |
In this summary map, published the year after Roald Amundsen had successfully completed the first transit of the Northwest Passage, the explored world reaches beyond 87 N latitude. |