Robert Van Vorst Sewell ( 1860 - 1924 ) was an American painter. Robert Van Vorst Sewell s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 5750 USD for PRE-RAPHAELITE PAINTING OF A MOUNTED KNIGHT PAINTING OF A MOUNTED KNIGHT in 2004 to 17775 USD for Monhegan in 2006 , based on the size and medium of the artwork.