Loys Prat ( 1879 - 1934 ) was a French painter. Loys Prat s works have been put up for auction numerous times, with realized prices varying from 113.98 USD for Vieille fontaine à Grignan in 2012 to 293.57 USD for Falaises surplombant une rivière in 2012 , based on the size and medium of the artwork.