John Greenhill ( 1640 - 1676 ) was a British painter. John Greenhill s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1445.7 USD for Portrait of a gentleman, bust-length, in a brown cloak, in a sculpted cartouche in 2004 to 7370.74 USD for Portrait study of a young man, bust-length, with long flowing hair in 2011 , based on the s