unknown The British East India Company negotiates a lease of the Darjeeling area west of the Mahananda River, from the Kingdom of Sikkim. The British Geological Survey is founded, as the world's first national geological survey. Civil war erupts in Uruguay, between supporters of the Blanco and Colorado parties. The Cachar Levy, forerunner of the Assam Rifles, is founded in India. The first Bulgarian-language school opens in the Ottoman Empire. The French word for their language changes to français, from françois. Fort Cass is established, the military headquarters and site of the largest internment camps during the 1838 Trail of Tears. Charles-Louis Havas creates Havas, the first news agency in the world (which later spawns Agence France-Presse). English becomes the official language of India. Juan Manuel de Rosas becomes Caudillo of Argentina. Edward Strutt Abdy publishes his Journal of a Residence and Tour in the United States of North America: From April, 1833, to October 1834. David Strauss begins publication of Das Leben Jessu, kritisch bearbeitet ("The life of Jesus, critically examined") in Tübingen. Births January–June January 14 – Emmy Rappe, Swedish nurse pioneer (d. 1896) February 13 – Mirza Ghulam Ahmad, founder of the Ahmadiyya Muslim Community (d. 1908) February 15 – Demetrius Vikelas, Greek International Olympic Committee president (d. 1908) February 18 – César Cui, Lithuanian composer (d. 1918) February 22 – Jeannette Walworth, American novelist, journalist (d. 1918) March 12 Simon Newcomb, Canadian-American astronomer (d. 1909) Sigismondo Savona, Maltese educator and politician (d. 1908) March 14 – Giovanni Schiaparelli, Italian astronomer (d. 1910) March 15 – Eduard Strauss, Austrian composer (d. 1916) March 21 – Maria Magdalena Mathsdotter, Swedish Sami educator (d. 1873) March 24 – Jožef Stefan, Slovenian physicist, mathematician, and poet (d. 1893) April 1 – Big Jim Fisk, American entrepreneur (d. 1872) April 4 – John Hughlings Jackson, English neurologist (d. 1911) April 9 – King Leopold II of Belgium (d. 1909) May 3 – Alfred Austin, English poet (d. 1913) May 18 – Charles N. Sims, American Methodist preacher, third chancellor of Syracuse University (d. 1908) May 21 – František Chvostek, Moravian physician (d. 1884) June 2 – Pope Pius X (d. 1914) June 6 – Ștefan Fălcoianu, Romanian general and politician (d. 1905) June 9 – Ramón Barros Luco, 15th President of Chile (d. 1919) June 10 – Ferdinand IV, Grand Duke of Tuscany, (d. 1908) June 12 – George Atzerodt, conspirator