Efa Prudence Heward ( 1896 - 1947 ) was a Canadian painter. Efa Prudence Heward s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 15903.76 USD for STILL LIFE OF A PLANT ON A WINDOW SILL in 2011 to 26145.06 USD for WHITE FISH FALLS, GEORGIAN BAY in 2011 , based on the size and medium of the artwork.