Jonathan Pratt ( 1835 - 1911 ) was a painter. Jonathan Pratt s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 8494 USD for James Watt s workshop in 2002 to 11664.07 USD for THE HALL AND STAIRCASE OF A COUNTRY HOUSE in 2013 , based on the size and medium of the artwork.