remains for him to do but to seek admission into the fold of the Catholic Church. This act has not, however, changed the essence of his faith. The _objectum materiale quod_ of faith need not include explicitly the infallibility of the church, since all theologians maintain that the knowledge of God, the Trinity, and the Incarnation, is all that is necessary _ex necessitate medii_, or by an absolute necessity, to saving faith; and many maintain that it is the knowledge of God as the supernatural rewarder which is alone to be placed in this category. Nor is the infallibility of the church included in the _objectum materiale quo_ of faith, that is in the objective motive or determining cause of belief, which is the veracity of God. Billuart and De Lugo may be consulted on this point by any who wish to ascertain the germane sense of Catholic theology. Archbishop Manning, in a letter to Dr. Pusey, on the Workings of the Holy Spirit in the Church of England, has brought out this doctrine with appropriate proofs and citations in a very lucid and admirable manner. The letter can be found in the Catholic World for June, 1865. The same had been previously done by Father Walworth, in a sermon entitled Good Samaritans, published in the Volume of Paulist Sermons for 1864. The church is the medium through which the object of faith is intellectually beheld, and the only medium. It is, therefore, impossible for her to substitute any other material object of faith in lieu of the true object, and equally impossible that the material object of faith should be seen at all through any other medium. Whoever, therefore, believes what the church proposes to his belief, necessarily believes in the true object of faith, and whoever believes in the true object of faith necessarily believes in it through the proposition of the church.