 During the Reign of Terror he was imprisoned and sentenced to death, but the capital punishment was commuted into one of deportation.It is not quite clear whether this was put into execution; but it is certain that with the fall of Robespierre he regained his liberty and returned with shattered health to the convent in Heidelberg (1796).In 1799 he became professor of Oriental Languages, Exegesis and Pastoral Theology in Heidelberg.