John Robert Keitky Duff ( 1862 - 1938 ) was a British painter. John Robert Keitky Duff s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 131.5 USD for Driving the flock in 2004 to 2886.93 USD for THE SHEPHERD BOY in 2005 , based on the size and medium of the artwork.