Frederick Sproston Challener ( 1869 - 1958 ) was a Canadian painter. Frederick Sproston Challener s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 750 USD for UNTITLED; POSING DANCER in 2004 to 7836.73 USD for GATHERING SHELLS in 2008 , based on the size and medium of the artwork.