– Robert Rolfe, 1st Baron Cranworth, English Lord High Chancellor of Great Britain (b. 1791) July 29 – John Elliotson, English physician (b. 1791) August 3 – Edward Welch, Welsh architect (b. 1806) August 10 – Adah Isaacs Menken, American actress (b. 1835) August 11 – Thaddeus Stevens, American politician (b. 1792) August 25 – Charlotte Birch-Pfeiffer, German actress, writer and theater director (b. 1799) August 29 – Christian Friedrich Schönbein, German chemist (b. 1799) September 1 – Ferenc Gyulay, Hungarian nobleman, general and governor (b. 1799) September 9 – Mzilikazi, first king of Mthwakazi (b. c.1790) September 11 – Maria James, Welsh-born American poet (b. 1793) September 19 – William Sprague, American minister and politician from Michigan (b. 1809) September 26 – August Ferdinand Möbius, German mathematician and astronomer (b. 1790) October 1 – Mongkut (Rama IV), King of Siam (Thailand) (b. 1804) October 9 – Howell Cobb, American politician (b. 1815) October 17 – Laura Secord, Canadian patriot (b. 1775) October 27 – Charles Longley, Archbishop of Canterbury (b. 1794) November 13 – Gioachino Rossini, Italian composer (b. 1792) November 15 – James Mayer de Rothschild, German-born banker (b. 1792) November 27 – Chief Black Kettle, Southern Cheyenne Peace Chief, Survivor of Sand Creek massacre (b. 1803) December 6 – August Schleicher, German linguist (b. 1821) December 23 – Sir Herbert Edwardes, British army general and colonial administrator (b. 1819) December 25 – Linus Yale, Jr., American inventor (b. 1821) December 31 – Cyrus Kingsbury, American missionary and Choctaw linguist (b.1786) References + via Google Books Leap years in the Gregorian calendar