WILLIAM JOHN HOPKINSON ( 1887 - 1970 ) was a Canadian painter. WILLIAM JOHN HOPKINSON s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 326.44 USD for GRASS LAKE, HALIBURTON in 2006 to 1994.16 USD for “EVENING” MOOSE CREEK HALIBURTON in 2012 , based on the size and medium of the artwork.