John Gould & William Hart ( 1850 - 1880 ) was a British painter. John Gould & William Hart s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 980 USD for Two Framed Ornithological Lithographs in 2012 to 1000 USD for [Birds of Paradise]: Six Plates in 2012 , based on the size and medium of the artwork.