Editing 1761 (section)

=== April&ndash;June ===
* [[April 1]] &ndash; The [[Austrian Empire]] and the [[Russian Empire]] sign a new treaty of alliance. <ref>Herbert J. Redman, ''Frederick the Great and the Seven Years’ War, 1756–1763'' (McFarland, 2015) p422</ref>
* [[April 4]] &ndash; A severe epidemic of [[influenza]] breaks out in [[London]] and "practically the entire population of the city" is afflicted; particularly contagious to pregnant women, the disease causes an unusual number of miscarriages and premature births. <ref>"Relation of Influenza to Pregnancy and Labor", by Dr. P. Brooke Bland, in ''The American Journal of Obstetrics and Diseases of Women and Children'' (February 1919) pp185-186</ref>
* [[April 14]] &ndash; [[Thomas Boone (governor)|Thomas Boone]] is transferred south to become the Royal Governor of South Carolina after proving to be unable to work with the local assembly as the Royal Governor of New Jersey. <ref>"Thomas Boone", by Larry R. Gerlach, in ''The Governors of New Jersey: Biographical Essays'', ed. by Michael J. Birkner, et al. (Rutgers University Press, 2014) p87</ref>
* [[May 4]] &ndash; The first multiple death tornado in the 13 American colonies strikes [[Charleston, South Carolina]], killing eight people and sinking five ships in harbor.  <ref>T. P. Grazulis, ''The Tornado: Nature's Ultimate Windstorm'' (University of Oklahoma Press, 2003)  p217</ref>
* [[May 9]] – [[Exhibition of 1761]], the innaugaral exhibition of the [[Society of Artists of Great Britain]] opens at [[Spring Gardens]] in London<ref>Hargreaves, Matthew. ''Candidates for Fame: The Society of Artists of Great Britain, 1760-1791''. Paul Mellon Centre for Studies in British Art, 2005. p.174</ref>
* [[June 6]] &ndash; (May 26 old style); A [[transit of Venus]] occurs, and is observed from 120 locations around the Earth. In his observations by telescope at [[St. Petersburg]], [[Mikhail Lomonosov]] notes a ring of light around the planet's silhouette as it begins the transit, and becomes the first astronomer to discover that the planet Venus has an atmosphere.  <ref>Govert Schilling, ''Atlas of Astronomical Discoveries'' (Springer, 2011) p41 </ref>