John Hoppner ( 1758 - 1810 ) was a British painter. John Hoppner s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 15136.09 USD for Portrait of Eleanor Agnes, wife of Robert, 4th Earl of Buckinghamshire, three-quarter-length, in a white dress and a black shawl in 2003 to 189750 USD for PORTRAIT OF LADY CHARLOTTE PERCY, COUNTESS OF