Births on September 9

Richard Chenevix Trench, Irish-English archbishop and philologist (d. 1886)

Richard Chenevix Trench (Richard Trench until 1873; 9 September 1807 – 28 March 1886) was an Anglican archbishop and poet.

7 Feb

Battle of Eylau
Napoleonic Wars: Napoleon finds Bennigsen's Russian forces taking a stand at Eylau. After bitter fighting, the French take the town, but the Russians resume the battle the next day.
19 Feb

Aaron Burr
Former Vice President of the United States Aaron Burr is arrested for treason in Wakefield, Alabama and confined to Fort Stoddert.
12 Apr

Fort Ricasoli
The Froberg mutiny ends when the remaining mutineers blow up the magazine of Fort Ricasoli.
22 May

Aaron Burr
A grand jury indicts former Vice President of the United States Aaron Burr on a charge of treason.
20 Jul

Internal combustion engine
Nicéphore Niépce is awarded a patent by Napoleon for the Pyréolophore, the world's first internal combustion engine, after it successfully powered a boat upstream on the river Saône in France.