above-mentioned censure of Heraclas, to preach. When Heraclas heard this, he came to Thmuis and deposed Ammonius, and appointed in his stead Philippus as bishop. Afterwards, on the earnest request of the people of the city, he restored Ammonius to the office of bishop, and ordained that he and Philippus should be bishops together. The latter, however, voluntarily gave way to Ammonius, and succeeded him at his death. Such, ninety years before the Nicene Council, which recognised and approved these powers of the bishop of Alexandria, as being after the model of those exercised by the bishop of Rome,(215) was his authority by the natural force of the hierarchic principle which built up the Church. And so little were these Christian communities, which we have seen so complete in their own organic growth, independent of the bond which held the whole Church together, and of which the authority of the Egyptian primate was itself a derivation. These, then, were the two modes in which the Christian Faith pursued and attained its orderly increase; as a seed it grew to a plant in each city, and as a plant it ramified, or as Tertullian says, carried “the vine-layer of the faith”(216) from city to city, from province to province. In the meantime the last disciples of the Apostles, those who from the especial veneration with which they were regarded as teachers of the Faith and “second links in the chain of tradition,” were termed Presbyters,(217) had died out. S. Polycarp, at the time of his martyrdom in 167, was probably the sole remaining one, though his pupil S. Irenæus had known others. When the latter, upon the martyrdom of S. Pothinus in 177, is raised to the government of the See of Lyons, we may consider that no one survived in possession of that great personal authority which belonged to those who had themselves been taught by Apostles; and so at the third generation from the last of these the Church throughout the world stood without any such support, simply upon that basis of the tradition and teaching of the truth, and of the succession of rulers, on which the Apostles had placed it, to last for ever. Now in this position it had already, throughout the whole course of the second century, been violently assaulted by a family of heresies, which growing upon one root—a natural philosophy confusing the being of God with the world—burst forth into an astonishing variety of outward forms. Gnosticism completely altered and defaced Christian doctrine under each of the four great heads, the Being of God, the Person of Christ, the nature of man, the office and function of the Church. Into the Godhead it introduced a dualism, recognising with the absolute good an absolute evil represented by matter: it denied the reality of the Incarnation; it made the body a principle of evil in man’s nature: but we will here limit ourselves to the characteristic and formal principle of the system from which it derived its name, to Gnosis as the means of