May 11 Charles XIV of Sweden–Norway is crowned king of Sweden. The Old Vic Theatre is founded (as the Royal Coburg Hall) in London. The Westmorland Gazette is first published at Kendal in the Lake District of England; in July, Thomas De Quincey will begin a 16-month term as editor. June – Battle of Kafir Qala: The Afghans defeat a Persian invasion. June 10 – The British Parliament is dissolved by Prime Minister Jenkinson, and new elections are scheduled for August 4 for the House of Commons. June 11 – Prince William, Duke of Clarence and St Andrews, third oldest son of King George III and the future King William IV of the United Kingdom, marries Adelaide of Saxe-Meiningen. June 18 – At least 34 people are killed in Switzerland, when the melting of a glacier releases the natural dam of Lac de Mauvoisin, sending the waters of the lake and the Dranse River into the valley of Bagnes. July–September July 1 – After a war that began on November 5, 1817, the forces of the East India Company defeat Baji Rao II in battle and acquire control over the Maratha Empire. July 3 – English poet Lord Byron, resident in Italy, begins work on his satirical epic Don Juan. Although he completes the first canto by September 19, he will die in 1824 before he can finish the poem, after completing 16 cantos and working on the 17th. July 11 – The Bank of the United States reverses its policy of expanding credit, and sends notices to its borrowers nationwide demanding immediate repayment of balances due; the defaults during the next six months will trigger the Panic of 1819. July 15 – U.S. President James Monroe convenes a cabinet meeting, to discuss whether General Andrew Jackson's unauthorized invasion and conquest of Spanish Florida should be disavowed by the White House. Secretary of State John Quincy Adams persuades the President that the action is justifiable, in stopping terror caused by the Seminole tribes. July 29 – French physicist Augustin-Jean Fresnel submits his prizewinning "Memoir on the Diffraction of Light" to the French Academy of Sciences, precisely accounting for the limited extent to which light spreads into shadows, and thereby demolishing the oldest objection to the wave theory of light. July 31 – The first newspaper in Cleveland, Ohio is issued by publisher Andrew Logan. Using the original name of the