The temperature on May 16, 1864 was about 18.6 °C. The air pressure was 2 kgf/m2 and came mainly from the north-northeast. The airpressure was 77 cm mercury. The atmospheric humidity was 62%. Source: KNMI
In The Netherlands , there was from February 1, 1862 to February 10, 1866 the cabinet Thorbecke II, with Mr. J.R. Thorbecke (liberaal) as prime minister.
April 18 » Battle of Dybbøl: A Prussian-Austrian army defeats Denmark and gains control of Schleswig. Denmark surrenders the province in the following peace settlement.
May 5 » American Civil War: The Battle of the Wilderness begins in Spotsylvania County.
May 7 » American Civil War: The Army of the Potomac, under General Ulysses S. Grant, breaks off from the Battle of the Wilderness and moves southwards.
May 31 » American Civil War: Overland Campaign: Battle of Cold Harbor: The Army of Northern Virginia engages the Army of the Potomac.
June 21 » American Civil War: The Battle of Jerusalem Plank Road begins.
August 10 » After Uruguay's governing Blanco Party refuses Brazil's demands, José Antônio Saraiva announces that the Brazilian military will begin reprisals, beginning the Uruguayan War.
When copying data from this family tree, please include a reference to the origin: Hendrik Dreyer, "Dreyer Tree", database, Genealogy Online (https://www.genealogieonline.nl/dreyer-tree/I17713.php : accessed January 17, 2026), "Petrus Johannes van der Merwe (1840-1927)".
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