He returned to politics to oppose the pro-slavery Kansas – Nebraska Act ( 1854 ); this law repealed the slavery-restricting Missouri Compromise ( 1820 ).

Percy Bysshe Shelley composed a " Hymn of Apollo " ( 1820 ), and the god's instruction of the Muses formed the subject of Igor Stravinsky's Apollon musagète ( 1927 – 1928 ).

Causes include controversy over admitting Missouri as a slave state in 1820, the acquisition of Texas as a slave state in 1845 and the status of slavery in western territories won as a result of the Mexican – American War and the resulting Compromise of 1850.

* 1820 – Nadar, French photographer, caricaturist, journalist, novelist and balloonist ( d. 1910 )

* 1820 – Alexander Ypsilantis is declared leader of Filiki Eteria, a secret organization to overthrow Ottoman rule over Greece.

* 1820 – George Grove, English historian ( d. 1900 )

* 1820 – John Tyndall, British physicist ( d. 1893 )

* 1890 – David Wilber, American politician ( b. 1820 )

* 1751 – Wilhelmina of Prussia, Princess of Orange ( d. 1820 )

* 1820 – Andrew Rainsford Wetmore, Canadian politician ( d. 1892 )

* 1820 – Constitutionalist insurrection at Oporto, Portugal.

* Alfonso Sanz y Martínez de Arizala ( 28 January 1880, Madrid – 1970 ), married in 1922 to María de Guadalupe de Limantour y Mariscal ( d. 1977, Marbella ), daughter of Julio de Limantour y Marquet ( 17 June 1863, Mexico City – 11 October 1909, Mexico City ) and wife Elena Mariscal y ..., paternal granddaughter of French Joseph Yves de Limantour y Rence de la Pagame ( 1812, Ploemeur – 1885, Mexico City ) and wife Adèle Marquet y Cabannes ( 1820, Bordeaux –?

* 1771 – Karl Philipp Fürst zu Schwarzenberg, Austrian field marshal ( d. 1820 )

* 1820 – Alexander Cartwright, American inventor of Baseball ( d. 1892 )

Anne Brontë (; 17 January 1820 – 28 May 1849 ) was a British novelist and poet, the youngest member of the Brontë literary family.

Four more children followed: Charlotte, ( 1816 – 1855 ), Patrick Branwell ( 1817 – 1848 ), Emily, ( 1818 – 1848 ) and Anne ( 1820 – 1849 ).

* 1899 – Joseph Wolf, German artist ( b. 1820 )

* Daniel Boone ( November 2, 1734 October 22 – September 26, 1820 ) was an American pioneer, explorer, and frontiersman whose frontier exploits made him one of the first folk heroes of the United States.

* 1820 – The Venus de Milo is discovered on the Aegean island of Melos.

Susan Brownell Anthony ( February 15, 1820 – March 13, 1906 ) was a prominent American civil rights leader who played a pivotal role in the 19th century women's rights movement to introduce women's suffrage into the United States.

* March 13 – Susan B. Anthony, American civil rights and women's suffrage activist ( b. 1820 )

* Susan B. Anthony ( February 15, 1820 – March 13, 1906 ) was a prominent American civil rights leader who played a pivotal role in the 19th century women's rights movement to introduce women's suffrage into the United States.

* Susan B. Anthony, ( 1820 – 1906 ), women's suffragist

Recorded wrecks on the 5 km stretch of coastline between Trwyn y Witch and Nash Point include: the Royal Hunter ( 1747 ), the Indian Prince ( 1752 ), the Elizabeth ( 1753 ), the Prince ( 1764 ), the George ( 1770 ), the Industry ( 1786 ), the Thomas ( 1806 ), the Bee ( 1820 ), the Harriet ( 1827 ), the Jessie Orasie ( 1831 ), the Frolic ( 1831 ), the Providence ( 1832 ), the Mayflower ( 1841 ), the New Felicity ( 1841 ), the Vigo ( 1842 ), the Betsey ( 1849 ), the Lucie ( 1854 ), the Williams ( 1854 ), the Mary & Deffus ( 1861 ), the Gillies ( 1862 ), the Elphis ( 1865 ), the Amelie ( 1870 ), the New Dominian ( 1872 ), the Bessie ( 1872 ), the John & Eliza ( 1876 ), the Jane & Susan ( 1882 ), the Ben-y-gloe ( 1886 ), the Malleny ( 1886 ), the Caterina Camogle ( 1887 ), the Denbigh ( 1888 ), the Tilburnia ( 1888 ), the Claymore ( 1892 ), the Lizzie ( 1892 ), the Elizabeth Couch ( 1913 ), the Narcissus ( 1916 ), the Pollensa ( 1919 ) and the Cato ( 1951 ).

A carpenter by trade, Ide married Susan Grout Haskell ( 1799 – 1850 ) in 1820.

* Carl Schurz ( 1820 – 1906 ), senator, secretary of the interior under Rutherford B. Hayes.

Governor Lewis B. Cass led an expedition through the area in 1820.

* Edward B. Jackson: Member of the 16th Congress to fill the vacancy caused by the resignation of James Pindall and reelected to the 17th Congress, served from October 23, 1820, to March 3, 1823

In 1820, he undertook the examination of the plants that had been collected around the headwaters of the Mississippi by David B. Douglass.

* Booknotes interview with Stephen B. Oates on The Approaching Fury: Voices of the Storm, 1820 – 1861, April 27, 1997.

D. B., 1997 C. G. Ehrenberg and W. F. Hemprich's Travels, 1820 – 1825, and the Insecta of the Symbolae Physicae Deutsche Entomologische Zeitschrift 44, ( 2 ): 165 – 202.

John Leavitt Stevens ( August 1, 1820 – February 8, 1895 ) was the United States Department of State Minister to the Kingdom of Hawaii in 1893 when he was accused of conspiring to overthrow Queen Liliuokalani in association with the Committee of Safety, led by Lorrin A. Thurston and Sanford B. Dole – the first Americans attempting to overthrow a foreign government under the auspices of a United States government officer.

* Hero, a British sloop used by Nathaniel B. Palmer to explore the Antarctic Peninsula between 1820 and 1822

This feature is named after Captain Nathaniel B. Palmer ; an American sealer who explored the Antarctic Peninsula area southward of Deception Island in the Hero in November, 1820.

It bore the name of its first editor, James Dunwoody Brownson DeBow ( J. D. B. DeBow, 1820 – 1867 ) who wrote much in the early issues ; however, there were several various writers over the years ( see below: Contributors ).

Popular collections included Ananias Davisson's Kentucky Harmony ( Harrisonburg, Virginia, 1817 ), Allen Carden's Missouri Harmony ( Cincinnati, 1820 ), William Walker's Southern Harmony ( 1835 ) and B. F. White and E. J.

Charles B. Stennett, at present an officiating priest in the Religious College of Maynooth, and late a lieutenant of grenadiers in the North York Regiment of Militia, Dublin, 1820, 8vo ; 14th edit.

* Griselda B. Tarragó, De la autonomía a la integración-Santa Fe entre 1820 y 1853.

Ritter proceeded, `` You now emerge into a new epoch in which late in the year 1819 or 1820, you will have to reckon.

The sequence of events leading to his important discovery still remains ambiguous but it seems that one of the advanced students at the university related that the first direct event that led to the publication of Oersted's discovery occurred during a private lecture made before a group of other advanced students in the spring of 1820.

They reached Fort Douglas in June 1820.

The Crittenden Compromise would have extended the Missouri Compromise line of 1820, dividing the territories into slave and free, contrary to the Republican Party's free-soil platform.

The Russian abacus was brought to France around 1820 by the mathematician Jean-Victor Poncelet, who served in Napoleon's army and had been a prisoner of war in Russia.

Despite compromises in 1820 and 1850, the slavery issues exploded in the 1850s.

As well as holding positions at this school until 1828, in 1819 and 1820 Ampère offered courses in philosophy and astronomy, respectively, at the University of Paris, and in 1824 he was elected to the prestigious chair in experimental physics at the Collège de France.

In September of 1820, Ampère ’ s friend and eventual eulogist François Arago showed the members of the French Academy of Sciences the surprising discovery of Danish physicist Hans Christian Ørsted that a magnetic needle is deflected by an adjacent electric current.

Australian English started diverging from British English after the founding of the colony of New South Wales in 1788 and was recognised as being different from British English by 1820.

Anne, the youngest member of the Brontë children, was born on 17 January 1820, at 74 Market Street in Thornton where her father was curate and she was baptised there on 25 March 1820.

In April 1820, the Brontës moved into the a five-roomed Haworth Parsonage which became their home for the rest of their lives.