Jacob Knyff ( 1638 - 1681 ) was a Dutch painter. Jacob Knyff s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 47876.89 USD for AN ENGLISH SHIP AND OTHER SHIPPING OFF CASTLE CORNET, GUERNSEY in 2005 to 105701.97 USD for CHARLES II AND JAMES, DUKE OF YORK, ON BOARD H.M.S. TRIUMPH, WITH THREE ROYAL YACHTS OFF DOVER in 2011 , based o