William Adolphus Knell (after) ( 1805 - 1875 ) was a British painter. William Adolphus Knell (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 153.55 USD for Dutch barges in a swell in 2005 to 1312.61 USD for Ships at anchor, a pair in 2016 , based on the size and medium of the artwork.