Cosimo resurrected a law from the regency of his father which banned Students from attending college outside Tuscany, thus strengthening the Jesuits' hold on education. A contemporary wrote that not a single man in Florence could read or write Greek, a stark contrast to those of the old republic. In a letter dated 10 October 1691, Cosimo's personal secretary wrote, "By the Serene Master's express command I must inform Your Excellencies that His Highness will allow no professor in his university at Pisa to read or teach, in public or in private, by writing or voice, the philosophy of Democritus, or of atoms, or any save that of Aristotle."