Henry Ernest Schnakenberg ( 1892 - 1970 ) was an American painter. Henry Ernest Schnakenberg s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 200 USD for 'Maidenhair Spleenwort' in 2004 to 2117 USD for VERMONT in 2017 , based on the size and medium of the artwork.