Valentine Henriette Prax ( 1899 - 1981 ) was a French painter. Valentine Henriette Prax s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 9600 USD for GIRLS RELEASING BIRDS in 2003 to 18765.38 USD for La moisson, 1926 in 2009 , based on the size and medium of the artwork.