Thaddeus Welch ( 1844 - 1919 ) was an American painter. Thaddeus Welch s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 3450 USD for Marin County, California in 2002 to 30000 USD for Thaddeus Welch in 2005 , based on the size and medium of the artwork.