Francis Blackwell Mayer ( 1827 - 1899 ) was an American painter. Francis Blackwell Mayer s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 1300 USD for Mountain View at Sunset in 2004 to 8000 USD for INDIAN POWWOW AT THE TREATY OF TRAVERSE DES SIOUX in 2006 , based on the size and medium of the artwork.