George Tjangala Wallaby ( 1940 - 2003 ) was an Australian painter. George Tjangala Wallaby s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 3696.57 USD for Kaarlbadoo-Watersnake 1999 in 2004 to 6669.31 USD for Yarkarn - The Dreamtime Muscle Man in 2005 , based on the size and medium of the artwork.