1870 US Map
| Source of Image | https://upload.wikimedia.org/wikipedia/commons/thumb/e/ed/United_States_Central_map_1870-01-26_to_1870-02-23.png/1024px-United_States_Central_map_1870-01-26_to_1870-02-23.png |
| Notes | Courtesy of Wikimedia Commons. |