The temperature on August 5, 1861 was about 26.4 °C. The air pressure was 4 kgf/m2 and came mainly from the south. The airpressure was 76 cm mercury. The atmospheric humidity was 56%. Source: KNMI
From February 23, 1860 till March 14, 1861 the Netherlands had a cabinet Van Hall - Van Heemstra with the prime ministers Mr. F.A. baron Van Hall (conservatief-liberaal) and Mr. S. baron Van Heemstra (liberaal).
From March 14, 1861 till January 31, 1862 the Netherlands had a cabinet Van Zuijlen van Nijevelt - Loudon with the prime ministers Mr. J.P.P. baron Van Zuijlen van Nijevelt (conservatief-liberaal) and Mr. J. Loudon (liberaal).
January 1 » Liberal forces supporting Benito Juárez enter Mexico City.
February 9 » American Civil War: Jefferson Davis is elected the Provisional President of the Confederate States of America by the Confederate convention at Montgomery, Alabama.
February 18 » In Montgomery, Alabama, Jefferson Davis is inaugurated as the provisional President of the Confederate States of America.
March 11 » American Civil War: The Constitution of the Confederate States of America is adopted.
July 21 » American Civil War: First Battle of Bull Run: At Manassas Junction, Virginia, the first major battle of the war begins and ends in a victory for the Confederate army.
September 17 » Argentine Civil Wars: The State of Buenos Aires defeats the Argentine Confederation at the Battle of Pavón.
Day of death August 20, 1867
The temperature on August 20, 1867 was about 30.4 °C. The air pressure was 2 kgf/m2 and came mainly from the south. The airpressure was 76 cm mercury. The atmospheric humidity was 53%. Source: KNMI
From June 1, 1866 till June 4, 1868 the Netherlands had a cabinet Van Zuijlen van Nijevelt - Heemskerk with the prime ministers Mr. J.P.J.A. graaf Van Zuijlen van Nijevelt (AR) and Mr. J. Heemskerk Azn. (conservatief).
February 13 » Work begins on the covering of the Senne, burying Brussels's primary river and creating the modern central boulevards.
February 28 » Seventy years of Holy See–United States relations are ended by a Congressional ban on federal funding of diplomatic envoys to the Vatican and are not restored until January 10, 1984.
September 2 » Mutsuhito, Emperor Meiji of Japan, marries Masako Ichijō, thereafter known as Empress Shōken.
November 3 » Giuseppe Garibaldi and his followers are defeated in the Battle of Mentana and fail to end the Pope's Temporal power in Rome (it would be achieved three years later).
November 23 » The Manchester Martyrs are hanged in Manchester, England, for killing a police officer while freeing two Irish Republican Brotherhood members from custody.
December 13 » A Fenian bomb explodes in Clerkenwell, London, killing six.
When copying data from this family tree, please include a reference to the origin: Charles Olson, "Olson's Tree", database, Genealogy Online (https://www.genealogieonline.nl/olsons-tree/P19051.php : accessed January 20, 2026), "Helen Howard Potter (1861-1867)".
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