1842 Alfred Packer, Colorado cannibal, born in Allegheny County, Pennsylvania.
1860 Tom Horn born in Scotland County Missouri.
1865 Platte Bridge Station renamed Ft. Caspar in honor of the late Caspar Collins, who had lost his life at the Battle of Platte Bridge Station earlier that year.
1877 Inventor Thomas A. Edison unveiled the phonograph.
1887 The Wyoming Central Railway opened its line between Douglas and Glenrock, thereby extending its rail service to the state line.
1895 The Federal District Court, sitting in Cheyenne, held that the Treaty of 1868 exempted Indians from the State's game laws. The decision would later be reversed.
1910 August Malchow defeated by Peter Jensen of Omaha, the "Battling Dane", in a fight at the Kirby Opera House in Sheridan. See September 25 for more on Malchow.
1913 Nathaniel Burt, author, born in Moose.
1940 Ernest Hemingway and Martha Gellhorn were married in Cheyenne. The wedding took place at the Union Pacific Depot dining room. Attribution: Wyoming State Historical Society.
1943 Goshen Vounty's harvest declared a success due to the efforts of immigrant Mexican laborers and Prisoners of War. Attribution. Wyoming Historical Society's history calendar.
1950 A DC3 (C-47) airplane crashed into Mount Moran, killing all 21 persons on board. The plane was flying in poor weather.
1957 The Department of Defense announced that F.E. Warren AFB would be the nation's first ICBM base.
1975 Dick Cheney assumes the position of White House Chief of Staff under Gerald Ford.