Simplify the following text for a Grade 5 native English-speaking person.
Original: He returned to Chile in 1860 , and he succeeded his father as director of El Mercurio de ValparaÃ so in 1866 .
Simplified: He came back to Chile in 1860 . In 1866 , he succeeded his father as the director of El Mercurio de ValparaÃ so .