HCR diary 24.11.1821 party at Aders "Also a Mr Harcour (or some idem sonam) who is said to sing well and has a modest and sensible air"
29.11.1822 at Aders "Mrs Harcourt a niece of Aders was just arrived - a very plain woman but she looks amiable and Mrs A: says she is accomplished"
Auguste, eldest daughter of Johann Jakob Aders (1768-1825) older brother of Charles Aders, and his wife Anna Helena (d 1844) daughter of Johann Heinrich Brinck (1748-1817) banker. They were married 20.5.1793 and Auguste was born in 1794. She married on16.4.1819 Karl Friedrich Harkort (1788-1862) son of Johann Caspar Harkort and Henrietta nee Albers