R. Moses Raphael De Aguilar left dozens of manuscripts and self-published books. He run a successful private school for his students and intellectuals from around 1654 and corresponded with friends in France, the Republic of letters, notably with Isaac Orobio, whose contributions were recorded in many of his treatises. In 1659, he replaced Menasseh Ben Israel as the head of Ets Haim, the Talmud Torah community school in Amsterdam (Pieterse, 1968), where he pioneered a programme to introduce scholars to the basics of the TRIVIUM Liberal Arts*, the Medieval and Renaissance study of Grammar, Logic and Rethoric of classical antiquity: * the virtue of "liberality" in a classical sense meant a wise disposition of generosity, also in terms of creativity.