Cathleen Mann ( 1896 - 1959 ) was a British painter. Cathleen Mann s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 2292.26 USD for ON THE GRAND CANAL, VENICE in 2003 to 4080 USD for FILM STARS USE SHELL / YOU CAN BE SURE OF SHELL in 2010 , based on the size and medium of the artwork.