William Pether (after) ( 1731 - 1821 ) was a British painter. William Pether (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 100.94 USD for PORTRAIT OF A YOUNG WOMAN AS A SYBIL in 2008 to 646.49 USD for Bildnis des Geigenspielers Carlo Tessarini da R... in 2014 , based on the size and medium of the artwork.