Henri (henri Boulanger) Gray ( 1858 - 1924 ) was a French painter. Henri (henri Boulanger) Gray s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 254.68 USD for MIDLAND RAILWAY in 2006 to 1300 USD for GLADIATOR in 2014 , based on the size and medium of the artwork.