sentences:  From the mid-1950s until his retirement in 1976, he was literary director of the Arnoldo Mondadori Editore publishing house.His later collections of poetry included "Gli strumenti umani" (1965) and "Stella variabile" (1981).He was a prolific translator, rendering into Italian the works of Pierre Corneille, Paul Valéry and William Carlos Williams, among others.