May 3 Battle at Tolentino: Austria beats King Joachim of Naples May 16 The Governor of New South Wales, Lachlan Macquarie, officially names the town of Blackheath in the upper Blue Mountains May 24 English surveyor George Evans is the first European to discover the Lachlan River, Australia Apr 1815 Historical Events by Year Jun 1815 Famous People Who Were Authors Dictators Explorers Outlaws Queens Spies