Editing 1823 (section)

===October–December===
* [[October 5]] – ''[[The Lancet]]'' medical journal is founded by [[Thomas Wakley]] in London.
* [[October 22]] – [[Simón Bolívar]] writes to Paraguayan dictator [[José Gaspar Rodríguez de Francia]] to release his friend the explorer [[Aimé Bonpland]] under threat of invasion. Rodríguez never responds to the letter. 
* [[November 3]] – An explosion at the Rainton Colliery Company's Plain Pit mine at [[Chilton Moor]] in the north-east of England, kills at least 57 coal miners.<ref>{{cite book|first=Maureen|last=Anderson|title=Durham Mining Disasters: c1700-1950s|location=Barnsley|publisher=Wharncliffe|year=2008}}</ref>
* [[November 7]] – General [[Rafael del Riego]] is executed in Madrid for [[high treason]]
* [[November]] – According to tradition, [[William Webb Ellis]] invents the sport of [[rugby football]] at [[Rugby School]] in England.<ref name=CBH/>
* [[December 2]] – [[James Monroe]] first introduces the [[Monroe Doctrine]] in the [[State of the Union address]], declaring that any European attempts to recolonize the Americas would be considered a hostile act towards the United States.