George Sumner Coleman . Aliases: George Sumner Colman ( 1881 - 1934 ) was an American painter. George Sumner Coleman s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 353 USD for Rocky Coastline in 2004 to 1840 USD for Sailboat along the California coast in 2008 , based on the size and medium of the artwork.