- Count Adolph Ribbing and Baron Hans Henrik von Essen; the duel was held because Essen's proposal had been accepted by the father of a woman, the heiress Charlotta Eleonora De Geer, whom Ribbing had also proposed to and whom he believed to be in love with him. Essen was injured and Ribbing declared winner. The duel was regarded a scandal and a crime against the king.
Births
30 July - Kisamor, herbalist and natural doctor (died 1842)