“ Another work, De negligentia praelatorum, was directed against the neglect of their duties by the higher clergy, and he addressed a petition for the reform of the church (Advisamentum pro reformatione ecclesiae) to Pope Nicholas V. This having no effect, he issued the most outspoken of his works, De Septem ecclesiae statibus, in which he reviewed the work of the reforming councils of his time, and, without touching the question of doctrine, championed a drastic reform of life and practice of the church on the lines laid down at Constance and Basel. ”