Theodor Geisel ( 1904 - 1991 ) was an American painter. Theodor Geisel s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 6600 USD for THE GRINCH in 2003 to 80500 USD for Boy tries to warn the King, but is intercepted by Lord Droon in 2007 , based on the size and medium of the artwork.