John Jackson (after) ( 1778 - 1831 ) was a painter. John Jackson (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 410.55 USD for PORTRAIT OF CAPTAIN DURELL DE SAUSMAREZ in 2008 to 1075.53 USD for Portrait of Sir James McGrigor, 1st Bt. (1771-1858), military surgeon, three-quarter-length, seated, with letters and books on