James Watson ( 1740 - 1790 ) was a British painter. James Watson s works have been put up for auction numerous times, with realized prices varying from 450.43 USD for Sir Jeffrey Amherst in 2005 to 2500 USD for Portrait of Queen Caroline Mathilde of Denmark (1751-1775), née Princess of Great Britain. in 2014 , based on the size and medium of the artwork.