(b. 1734) August 18 – Matthew Boulton, English manufacturer, engineer (b. 1728) August 29 – Lucy Barnes, American writer (b. 1780) September 1 – Johann Friedrich August Göttling, German chemist (b. 1753) September 3 – George Coventry, 6th Earl of Coventry, English noble and politician (b. 1722) September 7 Buddha Yodfa Chulaloke (Rama I), King of Siam, founder of the Chakri dynasty of Thailand (b. 1737) Caroline Schelling, German scholar (b. 1763) October 8 – James Elphinston, Scottish philologist (b. 1721) October 11 – Meriwether Lewis, American explorer (suicide) (b. 1774) October 30 – William Cavendish-Bentinck, 3rd Duke of Portland, Prime Minister of the United Kingdom (b. 1738) November 9 – Paul Sandby, English cartographer, painter (b. 1725) November 28 – Jakob Heinrich Laspeyres, German lepidopterist (b. 1769) December 16 – Antoine François, comte de Fourcroy, French chemist (b. 1755) References