Gustave Mardoché Neymark ( 1850 - ) is a French painter. Gustave Mardoché Neymark s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 826 USD for Charging Cossacks in 2004 to 1129.76 USD for Pesage de Longchamps in 2014 , based on the size and medium of the artwork.