Editing 1858 (section)

=== April–June ===
* [[April 16]] – The [[Wernerian Natural History Society]], a former Scottish [[learned society]], is wound up.
* [[April 19]] – The United States signs a treaty with the [[Yankton Sioux Tribe]].
* [[April 28]]–[[May 1]] – [[Battle of Grahovac]]: The [[Ottoman Empire|Ottomans]] are decisively defeated by  [[Montenegro|Montenegrin]] forces.
* [[May 11]] – [[Minnesota]] is admitted as the 32nd [[U.S. state]].
* [[May 13]] – [[John Ruskin]] begins a tour of Europe; he considers it a significant turning point in his life.<ref>{{cite book|first=John|last=Ruskin|title=Letters From The Continent, 1858|url=https://archive.org/details/lettersfromconti0000rusk|url-access=registration|editor=Hayman, John|publisher=University of Toronto Press|year=1982|isbn=0-8020-5583-4}}</ref>
* [[May 14]] – [[David Livingstone]]'s 6-year [[Second Zambesi expedition]] arrives at the African coast.<ref>{{cite web|title=The Zambesi Expedition |url=http://www.livingstoneonline.ucl.ac.uk/companion.php?id=HIST4 |work=Livingstone Online |access-date=2011-08-26 |url-status=dead |archive-url=https://web.archive.org/web/20120302014847/https://www.livingstoneonline.ucl.ac.uk/companion.php?id=HIST4 |archive-date=March 2, 2012 }}</ref>
* [[May 19]] – "[[Bleeding Kansas]]: The [[Marais des Cygnes massacre]] is perpetrated by pro-slavery forces in the U.S. state of [[Kansas]].
* [[May]]–July – [[Mahtra War]]: Peasants in the [[Governorate of Estonia]], [[Russian Empire]] revolt against ongoing [[serfdom]], which was officially abolished in [[1816]].
* [[May]] (unknown date) – [[Japan]]ese [[Trading|trading company]], [[Itochu]] founded in [[Toyosato, Shiga]] [[Prefecture]], Japan.{{page needed|date=April 2020}}
* [[June 2]] – [[Comet Donati]], the first comet to be photographed, is discovered by [[Giovanni Battista Donati]], and remains visible for several months afterwards.
* [[June 13]]–[[June 17|17]] – The [[Treaty of Tientsin]] is signed, ending the first part of the [[Second Opium War]].
* [[June 16]] – [[Abraham Lincoln]] accepts the [[Republican Party (United States)|Republican Party]] nomination for a seat in the [[United States Senate]], delivering [[Lincoln's House Divided Speech|his ''House Divided'' speech]] in [[Springfield, Illinois]].
* [[June 17]] – The [[Atlantic and North Carolina Railroad]] opens, operating 95 miles from [[Goldsboro, North Carolina|Goldsboro]], [[North Carolina]], to [[New Bern, North Carolina|New Bern]], North Carolina.<ref>[http://www.historync.org/railroads.htm CommunicationSolutions/ISI, "Railroads — prior to the Civil War"] {{Webarchive|url=https://web.archive.org/web/20110726152211/http://historync.org/railroads.htm |date=July 26, 2011 }}, ''North Carolina Business History'', 2006, accessed 1 Feb 2010.</ref>
* [[June 18]] – The Queen of Jhansi, [[Rani Lakshmibai]], dies at 30 at [[Gwalior]], having been mortally wounded in combat against the British.
* [[June 19]] – A six-minute earthquake destroys much of [[Mexico City]] and devastates [[Texcoco, State of Mexico|Texcoco]].
* [[June 20]] – [[Indian Rebellion of 1857]]: The last rebels surrender in [[Gwalior]].
* [[June 23]] – Police of the [[Papal States]] seize Jewish boy [[Edgardo Mortara]], and take him away to be raised as a Catholic.