Crazy Horse (1840-1877)
Sep 5 Oglala Sioux chief (Battle of the Little Bighorn), dies at 37
- Sep 12 Julius Reitz, German cellist, composer, teacher, and music editor, dies at 64
William Henry Fox Talbot (1800-1877)
Sep 17 English photographic pioneer, dies at 77
- Sep 23 Urbain Jean Joseph le Verrier, French astronomer (made calculations that proved existence of Neptune), dies at 66
- Sep 25 Carl Reinhold August Wunderlich, German physician ( established normal temperature as 37 °C (98.6 °F), dies at 62
- Sep 26 Hermann Grassmann, German linguist and mathematician, dies at 68
- Sep 30 Toohoolhoolzote, prophet of Nez Perce indians, dies in battle