In the 1748 General Chapter or the Order at Bologna it was stated that the Thomistic philosophical and theological tradition needed to be revived. In 1757 Master General Juan Tomás de Boxadors composed a letter to all members of the Order lamenting deviations from Thomistic doctrine, and demanded a return to the teachings of Aquinas. This letter was also published in the General Chapter Acts in Rome 1777. Responding to Boxadors and to the prevailing philosophical rationalism of the Enlightenment, Salvatore Roselli, professor of theology at the Roman College of St. Thomas, published a six volume "Summa philosophica" (1777) giving an Aristotelian interpretation of Aquinas validating the senses as a source of knowledge. While teaching at the college Roselli is considered to have laid the foundation for Neothomism in the nineteenth century. According to historian J.A. Weisheipl in the late 18th and early 19th centuries "everyone who had anything to do with the revival of Thomism in Italy, Spain and France was directly influenced by Roselli's monumental work.