He had , of course , been to Paris and put in his time at the Louvre ; he had worked beside Camille Pissarro in Pontoise and Auvers in the mid-1870 's , absorbing the basics of Impressionism 's reasonable , systematic technique .
Paris
Louvre
/location/location/contains
LOCATION
Paris
LOCATION
Louvre
PERSON
Camille Pissarro
LOCATION
Pontoise