Dorothy Margaret Alderson & Elizabeth Mary Alderson ( 1900 - 1992 ) was a British painter. Dorothy Margaret Alderson & Elizabeth Mary Alderson s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 116.03 USD for Gladeye in 2011 to 647.12 USD for Fell ponies watering in 2013 , based on the size and medium of the artwork.