sentences:  He is most famous for having supplied the libretti for two operas composed by Rossini and for five operas composed by Donizetti.Introduced by his father to literature while very young, in addition to his native Italian, Ferretti mastered not only Latin and Ancient Greek but also French and English, and began writing verse early.Even though he worked in the tobacco industry from the age of about 30 until he was over 60, he was extremely prolific, writing "everything from love letter to odes and welcoming speeches", and numerous opera libretti, all but the few listed below being generally forgotten.