William Matthew Prior (after) ( 1806 - 1873 ) was an American painter. William Matthew Prior (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 3500 USD for portrait of a young lady in 2005 to 26450 USD for PORTRAITS OF JAMES DURFEE, JR and HORATIO NELSON DURFEE in 2008 , based on the size and medium of the artwork.