Gertrude Martineau ( 1840 - 1924 ) was a British painter. Gertrude Martineau s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 668.53 USD for Aviemore, Scotland in 2004 to 980.39 USD for Sunset on Sark, Channel Islands in 2007 , based on the size and medium of the artwork.