The author of the _Essay on the Development of Christian Doctrine_ states in another of his works that when he was admitted to the Church of Rome he embraced volumes containing the writings of the Christian Fathers, crying out that now they were really his own. The action and exclamation were thoroughly inconsistent with the position maintained throughout the Essay, and since then adopted by numbers of Roman controversialists. He ought rather to have cleared his shelves of the works of the Fathers, and to have consigned them to the lumber-room, with the remark, "Now I need never look at you any more." As Bishop Cornelius Mussus (Musso) said long ago, "For my part, to speak quite frankly, I would give more credence to a single Pope than to a thousand Augustines, Jeromes, and Gregorys" (_In Epist. ad Rom._ xiv., p. 606, Venet., 1588, quoted in Hardwick's edition of Archer Butler's _Letters on Romanism_, p. 394). It is the latest and most modern works on Roman theology, especially those which expound the utterances of the most recent Popes, that deserve to be studied, if the theory of the development be correct. According to that theory, the teaching of the primitive Church was certainly immature and defective, and possibly even erroneous. In order to find out what primitive writers meant, or _ought to have meant_, we must look to the latest developments. _They_ are the criteria by which to test the teaching of the early Church; it is beginning at the wrong end to test the developments by Christian antiquity. In former times Romanists were at great pains to show that traces of their peculiar tenets could be found in the writers of the first few centuries; and in not a few cases the works of these primitive writers were interpolated, in order to make out a fair case. Criticism has exposed these forgeries, and it has been demonstrated that the early Christian teachers were ignorant of whole tracts of Roman doctrine and practice. Roman controversy has therefore entirely shifted its ground. It now freely admits that these things were unknown to Irenæus, Cyprian, Chrysostom, Athanasius, and Augustine; but for the simple reason that, when they wrote, these things had not yet been revealed. The Church was still ignorant that the Blessed Virgin was conceived without sin, was taken bodily to heaven after her death, and ought to be invoked in prayer; it was still ignorant of the doctrine of purgatory, of indulgences, and of the necessity of being in communion with the Church of Rome. It will not do to say that Christ and His Apostles planted the _germs_ of these things, and that for centuries the germs did not expand and fructify, and therefore remained unnoticed. For, first, how can there be _a germ of an historical fact_, such as the supposed removal of the Virgin's body to heaven, which is most happily named an "assumption"? Secondly, now that the fruit _has_ appeared, we ought to be able to trace it back to the germ which for so long was ignored.