Thomas Sidney Cooper ( 1803 - 1902 ) was a British painter. Thomas Sidney Cooper s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 6704.07 USD for CATTLE RESTING BESIDE A RIVER in 2002 to 39428.1 USD for Cattle and sheep in an extensive landscape in 2004 , based on the size and medium of the artwork.