Yvonne Twining Humber ( 1907 - ) is an American painter. Yvonne Twining Humber s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 550 USD for PATIO, MEXICO in 2005 to 4147 USD for Still Life with Potted Geranium in 2008 , based on the size and medium of the artwork.