Isaac Sailmaker (after) ( 1633 - 1721 ) was a British painter. Isaac Sailmaker (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2935.67 USD for Ships of the fleet off Dover; and Warships off the Citadel at Plymouth in 2004 to 5813.95 USD for A naval engagement in 2009 , based on the size and medium of the artwork.