Robert Byng (after) ( 1666 - 1720 ) was an American painter. Robert Byng (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 302.95 USD for PORTRAIT OF A CHILD in 2005 to 2412.82 USD for Portrait of a young boy in 2012 , based on the size and medium of the artwork.