June 15 » Delaware Separation Day: Delaware votes to suspend government under the British Crown and separate officially from Pennsylvania.
July 12 » Captain James Cook begins his third voyage.
August 31 » William Livingston, the first Governor of New Jersey, begins serving his first term.
September 7 » According to American colonial reports, Ezra Lee makes the world's first submarine attack in the Turtle, attempting to attach a time bomb to the hull of HMS Eagle in New York Harbor (no British records of this attack exist).
September 10 » American Revolutionary War: Nathan Hale volunteers to spy for the Continental Army.
September 16 » American Revolutionary War: The Battle of Harlem Heights is fought.
Christening day October 12, 1777
The temperature on October 12, 1777 was about 15.0 °C. There was 44 mm of rainWind direction mainly northwest. Weather type: betrokken regen. Source: KNMI
January 15 » American Revolutionary War: New Connecticut (present-day Vermont) declares its independence.
April 13 » American Revolutionary War: American forces are ambushed and defeated in the Battle of Bound Brook, New Jersey.
August 22 » British forces abandon the Siege of Fort Stanwix after hearing rumors of Continental Army reinforcements.
September 3 » American Revolutionary War: During the Battle of Cooch's Bridge, the Flag of the United States is flown in battle for the first time.
October 7 » American Revolutionary War: The Americans defeat the British in the Second Battle of Saratoga, also known as the Battle of Bemis Heights.
December 19 » American Revolutionary War: George Washington's Continental Army goes into winter quarters at Valley Forge, Pennsylvania.
Day of death February 1, 1860
The temperature on February 1, 1860 was about 2.6 °C. There was 0.4 mm of rain. The air pressure was 1 kgf/m2 and came mainly from the west. The airpressure was 75 cm mercury. The atmospheric humidity was 93%. Source: KNMI
From March 18, 1858 till February 23, 1860 the Netherlands had a cabinet Rochussen - Van Bosse with the prime ministers J.J. Rochussen (conservatief-liberaal) and Mr. P.P. van Bosse (liberaal).
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).
March 17 » The First Taranaki War begins in Taranaki, New Zealand, a major phase of the New Zealand Wars.
March 28 » First Taranaki War: The Battle of Waireka begins.
May 18 » Abraham Lincoln wins the Republican Party presidential nomination over William H. Seward, who later becomes the United States Secretary of State.
June 30 » The 1860 Oxford evolution debate at the Oxford University Museum of Natural History takes place.
September 8 » The steamship PSLady Elgin sinks on Lake Michigan, with the loss of around 300 lives.
December 29 » The launch of HMSWarrior, with her combination of screw propeller, iron hull and iron armour, renders all previous warships obsolete.
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/I509502.php : accessed February 22, 2026), "Hendrik Mentz (1776-1860)".
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