Linguistically, in developing American English, in the early editions of A Compendious Dictionary of the English Language ( 1806 ), lexicographer Noah Webster suggested the neger new spelling in place of negro.

After his father's death in 1806, Webster handed over his practice to his older brother Ezekiel, who had by this time been admitted to the bar.

In 1806, Noah Webster published his first dictionary, A Compendious Dictionary of the English Language.

In 1806, then-lawyer Daniel Webster lost his first criminal case at the Plymouth courthouse, which now houses the Historical Society.

In 1806, Noah Webster published his first dictionary, A Compendious Dictionary of the English Language.

* Public resistance to spelling reform has been consistently strong, at least since the early 19th century, when spelling was codified by the influential English dictionaries of Samuel Johnson ( 1755 ) and Noah Webster ( 1806 ).

* Noah Webster, author of the first important American dictionary, believed that Americans should adopt simpler spellings where available and recommended it in his 1806 A Compendious Dictionary of the English Language.

Alexander Henry Haliday was born at Clifden, Holywood, a small seaside town in County Down, Ireland on 21 November 1806, the eldest child of Dr William Haliday ( 1763-1836 ) and Marion Webster.

He published lectures on the history of ancient sculpture in 1806, and painting in 1811, and edited the three volumes of an archaeological periodical called Amalthea from 1820 to 1825, which included contributions from the most eminent classical archaeologists of the day.

The poem, which is in couplet form, was first published in 1806 in Rhymes for the Nursery, a collection of poems by Taylor and her sister Ann.

The English lyrics were first published as a poem with the title " The Star " by sisters Ann and Jane Taylor ( 1783 – 1824 ) in Rhymes for the Nursery in London in 1806.

A rigorous proof was published by Argand in 1806 ; it was here that, for the first time, the fundamental theorem of algebra was stated for polynomials with complex coefficients, rather than just real coefficients.

Upon his return, Krusenstern wrote a detailed report, Reise um die Welt in den Jahren 1803, 1804, 1805 und 1806 auf Befehl Seiner Kaiserliche Majestät Alexanders des Ersten auf den Schiffen Nadeschda und Newa ( Journey around the World in the Years 1803, 1804, 1805, and 1806 at the Command of his Imperial Majesty Alexander I in the Ships Nadezhda and Neva ) published in Saint Petersburg in 1810.

* Roman Missal for the Use of the Laity in English and partly in Latin, published in London in 1806.

His first three fables, published in a Russian magazine in 1806, were imitations of La Fontaine ; the majority of those in his 1809 collection were likewise adaptations of La Fontaine.

* La Belle Assemblée, a British women's magazine published from 1806 to 1837 had many aquatint colored plates.

He took a prominent part, on the liberal side, in the ecclesiastical controversy that arose in connexion with Sir John Leslie's appointment to the post he had vacated, and published a satirical Letter ( 1806 ).

In 1806, after Napoleon's victory in the Battle of Jena-Auerstedt, Kotzebue fled to Russia and, in the safety of his estate in Estonia, wrote many satirical articles against Napoleon Bonaparte, published in his journals Die Biene ( The Bee ) and Die Grille ( The Cricket ).

The Organon is widely regarded as a remodelled form of an essay he published in 1806 called " The Medicine of Experience ", which had been published in Hufeland's Journal.

He produced translations of the Iliad ( 1778 ), of Plato ( 1796-1797 ), Aeschylus ( 1802 ), and Ossian ( 1806 ); he published in 1815 a Leben Alfreds des Grossen, and a voluminous Geschichte der Religion Jesu Christi ( 17 vols., 1806-1818 ).

While engaged in this great work Ersch also planned La France littéraire, which was published at Hamburg in 5 vols, from 1797 to 1806.

A year after the production of this treatise, Oken developed his system one stage further, and in a volume published in 1806, written with the assistance of Dietrich Georg von Kieser ( 1779 – 1862 ), entitled Beiträge zur vergleichenden Zoologie, Anatomie, und Physiologie, he demonstrated that the intestines originate from the umbilical vesicle, and that this corresponds to the vitelius or yolk-bag.

In 1805, Opie was elected a Professor at the Royal Academy and from May 1806 gave a series of 4 lectures which were later published as a book after his death, with a memoir by his widow Amelia Opie, in 1809.

In 1806, Jeffray published Cases of the Excision of Carious Joints by H. Park and P. F. Moreau with Observations by James Jeffray M. D ..

The first edition of Mela was published at Milan in 1471 ; the first good edition was by Vadianus ( Basel, 1522 ), superseded by those of Voss ( 1658 ), J Gronovius ( 1685 and 1696 ), A Gronovius ( 1722 and 1728 ), and Tzschucke ( 1806 – 1807 ), in seven parts ( Leipzig ; the most elaborate of all ); G Paithey's ( Berlin, 1867 ), gives the best text.

They arose in a natural geographic and economic expansion driven by the lucrative earnings available in the North American fur trade, in the wake of the various 1806 – 07 published accounts of the Lewis and Clark expeditions ' ( 1803 – 1806 ) findings about the Rockies and the ( ownership-disputed ) Oregon Country where they flourished economically for over three decades.

" The final title that was applied to the work when it was first published in October, 1806, was Sinfonia Eroica ... composta per festeggiare il sovvenire di un grand Uomo (" heroic symphony, composed to celebrate the memory of a great man ").

The third rhyme to come from Colchester is Twinkle Twinkle Little Star, which was written by Jane Taylor in the town's Dutch Quarter, and published in 1806 with the title " The Star ".

In 1806, the French chemists Louis-Nicolas Vauquelin and Pierre Jean Robiquet isolated a compound in asparagus that was subsequently named asparagine, the first amino acid to be discovered.

* 1806 – Santiago de Liniers, 1st Count of Buenos Aires re-takes the city of Buenos Aires, Argentina after the first British invasion.

Following his conquest of most of Western Europe, the first Napoleon made his elder brother Joseph ( 1768 – 1844 ) king first of Naples ( 1806 – 1808 ) and then of Spain ( 1808 – 1813 ), his third brother Louis ( 1778 – 1846 ) king of Holland ( 1806 – 1810 ) ( subsequently forcing his abdication after his failure to subordinate Dutch interests to those of France ) and his youngest brother Jérôme Bonaparte ( 1784 – 1860 ) king of Westphalia, the short-lived realm created from some of the states of northwestern Germany ( 1807 – 1813 ).

Image: Alexander Hamilton portrait by John Trumbull 1806. jpg | Alexander Hamilton, Founding Father and the first United States Secretary of the Treasury, Columbia College

* 1806 – British forces take Buenos Aires during the first British invasions of the Río de la Plata.

* 1806 – The Vellore Mutiny is the first instance of a mutiny by Indian sepoys against the British East India Company.

John Graves Simcoe ( February 25, 1752 – October 26, 1806 ) was a British army officer and the first Lieutenant Governor of Upper Canada from 1791 – 1796.

The Lewis and Clark Expedition, also known as the Corps of Discovery Expedition ( 1804 – 1806 ), was the first transcontinental expedition to the Pacific coast undertaken by the United States.

* 1806 – Construction is authorized of the Great National Pike, better known as the Cumberland Road, becoming the first United States federal highway.

The first documented definition of the word " cocktail " was in response to a reader's letter asking to define the word in the May 6, 1806, issue of The Balance and Columbia Repository in Hudson, New York.

Until 1900 civil engineering projects were generally managed by creative architects, engineers, and master builders themselves, for example Vitruvius ( first century BC ), Christopher Wren ( 1632 – 1723 ), Thomas Telford ( 1757 – 1834 ) and Isambard Kingdom Brunel ( 1806 – 1859 ).

He was born in Chelsea, London, and made his first appearance on the stage at Bath in 1806, and his first London appearance in 1808.

* February 25 – John Graves Simcoe, first Lieutenant-Governor of Upper Canada ( d. 1806 )

* August 23 – Alexander Calder, first mayor of Beaumont, Texas ( b. 1806 )

Donizetti was not especially successful as a choirboy, but in 1806 he was one of the first pupils to be enrolled at the Lezioni Caritatevoli school, founded by Mayr, in Bergamo through a full scholarship.

In this form the opera was first performed on 29 March and 10 April 1806, with greater success.

In 1806 the first edition of The Antiquities of the Anglo-Saxon Church appeared, a development of his informal lectures.

In 1806 – 1807, while at Auteuil, he first appeared before the public as a poet, with two pieces, one entitled Urania, in the classical style, of which he became later the most conspicuous adversary, the other an elegy in blank verse, on the death of Count Carlo Imbonati, from whom, through his mother, he inherited considerable property, including the villa of Brusuglio, thenceforward his principal residence.