Oct 7 Carbon paper patented in London by inventor Ralph Wedgwood Oct 8 British forces lay siege to French port of Boulogne using Congreve rockets, invented by Sir William Congreve Oct 9 Prussia declares war on France Oct 14 Battle of Auerstadt-French beat Prussians Oct 17 Former leader of the Haitian Revolution, Emperor Jacques I of Haiti is assassinated Oct 27 The French Army enters in Berlin Share On Facebook Share On Twitter 1805 Historical Events by Year 1807