Silva Porto ( 1850 - 1893 ) was a Portuguese painter. Silva Porto s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 5091.28 USD for Camponesa e papoilas nas margens do Oise in 2013 to 33051.78 USD for Saloias in 2014 , based on the size and medium of the artwork.