Colonel Latham Valentine Stewart Blacker ( 1887 - 1964 ) was a painter. Colonel Latham Valentine Stewart Blacker s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 870 USD for The Houston Westland Mount Everest Flight in 2007 to 2796.42 USD for The First Flight over Everest in 2007 , based on the size and medium of the artwork.