 Despite these controversies, Pomponazzi maintained his position at Bologna and continued to teach and write, pursuing many of the themes found in his psychological writings. In 1520, he completed De naturalium effectuum admirandorum causis sive de incantationibus (On the Causes of Marvelous Natural Effects or On Incantations). The work circulated in manuscript widely before being printed first in 1556 and again in 1567 (Regnicoli 2010). In the same year he finished De fato, de libero arbitrio, de praedestinatione (On Fate, Free Will, On Predestination), which was not printed until 1567. In 1521, he published De nutritione et augmentatione (On Nutrition and Growth). Given greater freedom to choose the subject of his lectures as the result of contract negotiations, Pomponazzi lectured on a number of Aristotle’s writings that were not part of the typical duties of an ordinary professor. These topics include Aristotle’s De generatione et corruptione and his zoological and meteorological writings. His Dubitationes in quartum Meteorologicorum librum (Doubts on Meteorologica IV) were printed in 1563. Pomponazzi, after several years of illness, died from kidney disease in 1525 (Nardi 1965: 205–6).