William Callcott Knell (after) ( 1830 - 1876 ) was a British painter. William Callcott Knell (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 858.27 USD for FISHING BOATS; STORMY SEAS in 2004 to 2435.19 USD for RETURNING TO PORT in 2007 , based on the size and medium of the artwork.