_Primacy_, the nature of, defined in the three palmary texts, 104-110 shown to consist in superiority of jurisdiction, 209-212 compared to the law of gravitation, 109, 209 institution and exercise of, compared, 155 the controversy on, reduced to one point, 205 summary of, as set forth in the Acts, 153 and generally, 200-203 the end and purpose of, 212 to which end three classes of reasons guide us, i. the typical, 213 ii. the analogical, 217 iii. the real, 219 bound up in the visibility and unity of the Church, 235 what is required of those who deny it, 247 its denial the origin of all actual divisions among Christians, 248 its proof as considered _absolutely_, 249 _comparatively_ with that for the divine institution of bishops, the real presence, and the divinity of Christ, 259-274 multiplicity of proof for it, 251-6 the opposition of Greeks, Anglicans, and Protestants to it, merely negative, 257 parallel between the opposition to it by sects now, and that to the doctrines of the Trinity and the Incarnation in the fourth, fifth, and sixth centuries, 264. _Primacy_ and _Apostolate_, their relation to each other, 78, 98-9, 102, 104. _Proclus_, Patriarch of Constantinople, calls Peter first prelate of the Apostles, 216. _Proofs_, the different sort of, and their whole sum, to be considered, 8 different sorts of, and the principal here used, 246 multiplicity of, for the Primacy, 247 as considered _absolutely_, 249 _comparatively_, 259 concurrence of four great proofs for the Primacy, 250. _Prudentius_, calls Peter the first disciple of God, 61. R. _Reformers_, distort Paul's censure of Peter, 172 opposition between them and the Fathers as to Peter's Primacy, 176 as to Church principles 227, note denied the visibility of the Church, 222, note. S. _Sacraments_ and _Symbols_ lead from the visible to the invisible, 192. _Sense_, in writing, definition of, 266, note. _Socrates_ and _Sozomen_, their canon respecting the bishop of Rome, 252. _Stephen_, bishop of Dora, describes Peter's Primacy, 56, 83. _Stephen_, bishop of Larissa, makes all the Churches of the world to rest in Peter's confession, 62. _Symmachus_, Pope A.D. 498-514 likens the unity of the Apostolic See to that of the Trinity, 196. T.