Willem Roelofs ( 1822 - 1897 ) was a Dutch painter. Willem Roelofs s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1868.92 USD for A COW IN A FIELD in 2003 to 81555.54 USD for WATERING COWS IN A SUMMER LANDSCAPE in 2003 , based on the size and medium of the artwork.