John Graham Gilbert ( 1794 - 1866 ) was a painter. John Graham Gilbert s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 297.59 USD for Portrait of a gentleman, seated, wearing black suit, a table with papers and quill beside him, and a landscape beyond in 2006 to 3814.76 USD for Portrait of a gentleman in a landscape, with a shot