 The council rules had stipulated a necessary two-thirds supermajority to reject the schemas.Although only 60 per cent had voted against the schemas, they were regardless discarded at the intervention of Pope John XXIII.Lefebvre became concerned about the direction the council's deliberations were taking, taking a leading part in a study group of bishops at the council which became known as the "Coetus Internationalis Patrum" (International Group of Fathers), with other traditionalist-leaning bishops Antônio de Castro Mayer, Bishop of Campos and Geraldo de Proença Sigaud, Archbishop of Diamantina.