John Riley ( 1646 - 1691 ) was a British painter. John Riley s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2308.11 USD for PORTRAIT OF A GENTLEMAN in 2003 to 26400 USD for Portrait of John Sheffield (1648-1721), 1st Duke of Buckingham and Normanby when Earl of Mulgrave, three-quarter-length, with th in 2006 , based on the s