1815 - Napoleon I of France is sent into exile on Saint Helena somewhere out there in the Atlantic Ocean.
1888 - The "From Hell" letter possibly sent by Jack the Ripper is received by investigators. Also known as the "Lusk letter," the letter is postmarked October 15 and was received by George Lusk . Upon opening the small box he discovered half a human kidney, probably from Catherine Eddowes, the fourth victim. Who ever wrote the letter also claimed to have fried and eaten the missing kidney half. Though, through the years, some have contended that it may have been a sick practical joke.
1894 - Alfred Dreyfus, an up and coming artillery officer and Jewish, was arrested for spying. So begins the Dreyfus Affair. He was pardoned in 1899 by President Emile Loubet while serving time in prison on Devil's Island. New evidence, actually old evidence that was covered-up by anti-Semitic army officers, found him innocent of all the charges and in 1906 Dreyfus was officially exonerated by a military commission.
1917 - On this date, just outside of Paris at Vincennes, Dutch exotic dancer, courtesan and spy Mata Hari, was executed by firing squad for being a double agent and spying for Germany. Many have argued that Mata Hari never really was a double agent and was used as a scapegoat by the head of the French counter-espionage, Georges Ladoux, who had recruited Mata Hari to be a French spy. Of course later Ladoux himself was arrested for being a double agent. The facts of the case have remained a bit hazy, the official documents concerning the execution were sealed for 100 years, and more details won’t be revealed until 2017.