MARY GRIERSON ( 1912 - 2012 ) was a British painter. MARY GRIERSON s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 224.44 USD for Hylocereus Undatus (night blooming cereus) in 2004 to 780.11 USD for Feathers of the birds of the hedgerow in 2006 , based on the size and medium of the artwork.