There was only one point in the discussions on the Church of Christ in which the outside world appeared to take an interest, and it is one which the council did not at first contemplate taking into consideration. The Fathers appear to have resolved to limit themselves, in treating of the Church, and consequently of the Head of the Church on earth, to the discussion of the primacy of the Supreme Pastor and of his temporalities. The commission of one hundred and two cardinals, and other learned theologians, had even set aside the question of infallibility when it came before them, one of their number pronouncing a decision on it as inopportune. A great majority of the bishops, however, were strongly of opinion that in view of the outcry which had been raised on this point, the opportunity of an Œcumenical Council being held should not be allowed to pass without defining the belief of the Church in regard to the unerring nature of the decisions, in matters of doctrine and morals, of the successor of St. Peter. At their request, accordingly, it was ordered that the important subject should be introduced in the eleventh chapter of the _schema_ on the Church, and prepared in the usual way for the consideration of the council. It could not be laid before the Fathers sooner than the 18th of July, when the fourth solemn session was held. It is proper to remark here that the doctrine in question was never discussed, either in the congregations or committees of the whole council, as to its Divine origin, or as to the fact of its having been revealed; not one of the seven hundred members of the council expressed any doubt as to this. There was no discussion except as to the opportuneness of defining to be of faith what all believed to be so. The _schema_ having passed through all the preparatory stages, finally assumed the form of a “dogmatic constitution,” which will be known in history as the Constitution, _Pastor æternus_, from the words with which it commences. This Constitution was brought before the council at a solemn session, the fourth and last which it held, the 18th July, 1870. The session was opened with all the usual solemnities. The Pope himself presided in person. The Mass of the Holy Ghost having been celebrated, the Sacred Scriptures were placed upon the lectern on the high altar, and, as was customary, the _Veni Creator_ was sung. The Bishop of Fabriano then read the Constitution, or decree _de Romano Pontifice_, from the _Ambo_ (pulpit), and the Fathers of the Council were invited to vote. Each Father, accordingly, as his name was called, took off his mitre, rose from his seat and voted. Of the five hundred and thirty-five who were present, five hundred and thirty-three voted _placet_ (aye), whilst there were only two nays. The secretary of the council, together with the scrutineers, advanced to the Pontifical throne and declared the result. The Holy Father then confirmed the decision in the usual form. He prayed, at the same