William Cowper ( 1731 - 1800 ) was a painter. William Cowper s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 150.14 USD for PORTRAIT BY M.B. AFTER GEORGE ROMNEY (1734-1802) in 2011 to 3471.22 USD for Anatomia corporum humanorum in 2011 , based on the size and medium of the artwork.