But opponents of Ubaghs soon appeared. The "Journal historique et littéraire" founded by Pierre Kersten (1789–1865), kept up an incessant controversy with the "Revue catholique". Opponents of Ubaghs' traditionalist ontologism who joined Kersten included Bonaventure Joseph Gilson (1796–1884) (dean of Bouillon), Jean-Joseph Lupus (1810–1888), and others. From 1858 to 1861 the controversy raged. It was at its height when a decision of the Roman Congregation (Sept. 21, 1864) censured in Ubaghs's works a series of propositions relating to ontologism. Already in 1843 the Congregation of the Index had taken note of five propositions and ordered Ubaghs to correct them and expunge them from his teaching, but he misunderstood the import of this first decision. When his career was ended in 1864 he had the mortification of witnessing the ruin of a teaching to which he had devoted forty years of his life.