Toward the end of his time in Naples, he read Martin Bucer's commentaries on the Gospels and the Psalms, and Zwingli's De vera et falsa religione.
Menjelang akhir masanya di Napoli, ia membaca komentar-komentar Martin Bucer tentang Injil-Injil dan Mazmur, dan De vera et falsa religione karya Zwingli.