March 5 » Boston Massacre: Five Americans, including Crispus Attucks, are fatally shot by British troops in an event that would contribute to the outbreak of the American Revolutionary War (also known as the American War of Independence) five years later.
April 19 » Captain James Cook, still holding the rank of lieutenant, sights the eastern coast of what is now Australia.
July 1 » Lexell's Comet is seen closer to the Earth than any other comet in recorded history, approaching to a distance of 0.0146 astronomical units (2,180,000km; 1,360,000mi).
August 21 » James Cook formally claims eastern Australia for Great Britain, naming it New South Wales.
August 22 » James Cook names and lands on Possession Island, and claims the east coast of Australia for Britain as New South Wales.
November 14 » James Bruce discovers what he believes to be the source of the Nile.
When copying data from this family tree, please include a reference to the origin: Ferry Posthuma Scholtes, "Family tree Posthuma", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-posthuma/R725.php : accessed December 26, 2025), "Baukjen Sjoerds Sjoerdsma (1770-????)".
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