George Theodore Berthon ( 1806 - 1892 ) was a Canadian painter. George Theodore Berthon s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 6500 USD for PORTRAIT OF LENA FULTON in 2003 to 40120 USD for COLONEL JEREMIAH WILKES DEWSON in 2010 , based on the size and medium of the artwork.