tolerated by the impatience of a population, which has little time and less mind for studies of this character. I have pursued, therefore, the humble task of _popularising_, so far as I could, Father Passaglia's work, omitting, as I trust, no essential part of the argument, and grouping it under different combinations, each of which might be in turn presented to the eye, and so more readily embraced. The importance of the argument, as it affects the Papal Supremacy, which is but a summary of the whole cause at issue between Protestantism in every shape, and the Church of Christ, cannot be overrated. If St. Peter be already set forth in Scripture as the Head and Bond of the Apostolic College, if he be delineated as the supreme Ruler who succeeds our Lord Himself in the visible government of His Church on earth, there becomes at once the strongest ground for expecting that such a Ruler will be continued as long as the Church herself lasts. Thus a guiding clue is given to us among all the following records of antiquity. Tradition and history become illuminated with a light which exhibits all objects in their due proportion and true grouping, when they are shown to be but the realisation of what the Incarnate Word, His Church's one only Lawgiver, decreed from the beginning, set forth not only in prophetic image, but distinct command, and stored up in words of such exceeding power, that they bear the whole weight of the kingdom of God, stretching through all ages and nations, without effort or pressure. And if ancient writers speak in no doubtful tone of St. Peter's prerogatives, yet clearer, more emphatic, and soul-piercing, as we should expect, are the words of God Himself, appealing in man's form to the mind and heart of man, whom He had created, and was come to redeem, and to knit into one eternal monarchy. A subsequent part of the argument, namely, that the Bishop of Rome _is_ successor of St. Peter, has been treated by the author in another work, "The See of St. Peter the Rock of the Church, the Source of Jurisdiction, and the Centre of Unity," specially in the fifth section, which ought, logically, to be preceded by this treatise. It is there proved that not only the Christian Fathers, as individual writers and witnesses, but the ancient Church in her universal Councils, did, with one voice, from age to age, regard the Pope as sitting in St. Peter's chair, which is proof enough, and all that can in reason be demanded, that the prerogatives given to St Peter as Head of the Church were, in the belief of the Church, and in full accordance with our Lord's own promise,[A] continued on to his successors, and are as imperishable as the life of the Church herself. 21, North Bank, Regent's Park, September, 1852. FOOTNOTES: [A] Matt. xvi. 18.--"Thou art Peter, and upon this rock I will build my Church, and the gates of hell shall not prevail against it," _i. e._, as founded on that rock. The foundation and the superstructure coexist for ever.