GUSTAVE LE GRAY AND AUGUSTE MESTRAL ( 1820 - 1884 ) was a French painter. GUSTAVE LE GRAY AND AUGUSTE MESTRAL s works have been auctioned off multiple times, with realized prices varying according to the size and medium of the artwork, for instance of 18750 USD for Vue générale des remparts de Carcassonne, prise de l’ouest in 2017