Christoph Friedrich von Ammon, German theological writer, preacher (b. 1766) May 24 Jane Porter, English novelist (b. 1776) Michał Gedeon Radziwiłł, Polish noble (b. 1778) May 31 – Giuseppe Giusti, Tuscan satirical poet (b. 1809) June 9 – John Green Crosse, English surgeon (b. 1790) June 16 – William Lawson, British explorer of New South Wales (b. 1774) June 19 – Margaret Fuller, American journalist (b. 1810) June 30 – Richard Dillingham, American Quaker teacher (b. 1823) July–September July 2 – Robert Peel, Prime Minister of the United Kingdom (b. 1788) July 4 – William Kirby, English entomologist (b. 1759) July 7 – Timothy Hackworth, British steam locomotive engineer (b. 1786) July 8 – Prince Adolphus of the United Kingdom, 1st Duke of Cambridge (b. 1774) July 9 The Báb, Persian founder of the Bábí Faith (executed by a firing squad) (b. 1819) Zachary Taylor, 65, 12th President of the United States (b. 1784) Jean-Pierre Boyer, President of Haiti (b. 1776) July 12 – Robert Stevenson, Scottish lighthouse engineer (b. 1772) July 14 – August Neander, German theologian, church historian (b. 1789) July 16 – Julia Glover, Irish-born British stage actress (b. ca. 1779) July 25 – Richard Barnes Mason, military governor of California (b. 1797) August 3 – Jacob Jones, U.S. Navy officer (b. 1768) August 6 Edward Walsh, Irish poet (b. 1805) Hōne Heke, Maori chief and war leader (b. c. 1807) August 13 – Martin Archer Shee, Irish painter, president of the Royal Academy (b. 1770) August 17 – General José de San Martín, Argentine military and South American independence hero (b. 1778) August 18 Charles Arbuthnot, British Tory politician (b. 1767) Honoré de Balzac, French author (b. 1799) August 22 – Nikolaus Lenau, Austrian poet (b. 1802) August 26 – King Louis Philippe I of France (b. 1773) August 27 – Thomas Kidd, English classical scholar, schoolmaster (b. 1770) September 2 – Charles Watkin Williams-Wynn, British Tory politician (b. 1775) September 12 – Presley O'Bannon, officer in the United States Marine Corps (b. 1784) September 22 – Johann Heinrich von Thünen, German economist (b. 1783) September 23 – José Gervasio Artigas, Uruguayan revolutionary (b. 1764) October–December October 2 – Sarah Biffen, English painter (b. 1784) October 11 – Louise, Queen of the Belgians (b. 1812) October 29 – Marmaduke Williams, Democratic-Republican U.S. Congressman from North Carolina (b. 1774) November 2 – Richard Dobbs Spaight Jr., Democratic