Theodore Penleigh Boyd ( 1890 - 1923 ) was an Australian painter. Theodore Penleigh Boyd s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 21.84 USD for River landscape in 2003 to 317117.12 USD for GHOST GUM AT KANGAROO FLAT in 2007 , based on the size and medium of the artwork.