Constant Troyon (after) ( 1810 - 1865 ) was a French painter. Constant Troyon (after) s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 679.46 USD for LANDSCAPE WITH CATTLE in 2005 to 7702 USD for BRINGING IN THE HERd in 2014 , based on the size and medium of the artwork.