Jules Cayron ( 1868 - 1940 ) was a French painter. Jules Cayron s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 237.14 USD for Jeté de dahlias in 2006 to 2629.5 USD for Portrait de Lady Avery (1875-1959) in 2016 , based on the size and medium of the artwork.