John Knox (after) ( 1778 - 1845 ) was a British painter. John Knox (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1150 USD for HIGHLANDERS IN A LOCH in 2004 to 1265.32 USD for DUMBARTON ROCK WITH A VESSEL AND FIGURES IN THE BACKGROUND in 2009 , based on the size and medium of the artwork.