Norman Ackroyd ( 1938 - ) is a British painter. Norman Ackroyd s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 160 USD for Gentle Rainstorm in 2004 to 3705.2 USD for Dwarfie Stane, Rackwick, Orkney in 2008 , based on the size and medium of the artwork.