Robert Ottokar Lindneux ( 1871 - 1970 ) was an American painter. Robert Ottokar Lindneux s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 293 USD for Black-Footed Ferret in 2004 to 4320 USD for The Silversmith in 2007 , based on the size and medium of the artwork.