consider the text of the Septuagint as being faulty in itself, i.e. Jerome thought mistakes in the Septuagint text were not all mistakes made by copyists, but that some mistakes were part of the original text itself as it was produced by the Seventy translators. Jerome believed that the Hebrew text more clearly prefigured Christ than the Greek of the Septuagint, since he believed some quotes of the Old Testament in the New Testament were not present in the Septuagint, but existed in the Hebrew version; Jerome gave some of those quotes in his prologue to the Pentateuch.<ref name=":0">{{Cite book|title=Jérôme : Préfaces aux livres de la Bible|publisher=Éditions du Cerf|year=2017|isbn=978-2-204-12618-2|editor-last=Canellis|editor-first=Aline|location=Abbeville|pages=99–109|language=fr|trans-title=Jerome : Preface to the books of the Bible|chapter=Introduction : Révision et retourn à lHebraica veritas|trans-chapter=Introduction: Revision and return to Hebraica veritas}}</ref> In the Galeatum principium (a.k.a. ), Jerome described an Old Testament canon of 22 books, which he found represented in the 22-letter Hebrew alphabet. Alternatively, he numbered the books as 24, which he identifies with the 24 elders in the Book of Revelation casting their crowns before the Lamb. In the prologue to Ezra, he sets the "twenty-four elders" of the Hebrew Bible against the "Seventy interpreters" of the Septuagint. In addition, many medieval Vulgate manuscripts included Jerome's epistle number 53, to Paulinus bishop of Nola, as a general prologue to the whole Bible. Notably, this letter was printed at the head of the Gutenberg Bible. Jerome's letter promotes the study of each of the books of the Old and New Testaments listed by name (and excluding any mention of the deuterocanonical books); and its dissemination had the effect of propagating the belief that the whole Vulgate text was Jerome's work. The prologue to the Pauline Epistles in the Vulgate defends the Pauline authorship of the Epistle to the Hebrews, directly contrary to Jerome's own views—a key argument in demonstrating that Jerome did not write it. The author of the is unknown, but it is first quoted by Pelagius in his commentary on the Pauline letters written before 410. As this work also quotes from the Vulgate revision of these letters, it has been proposed that Pelagius or one of his associates may have been responsible for the revision of the Vulgate New Testament outside the Gospels. At any rate, it is reasonable to identify the author of the preface with the unknown reviser of the New Testament outside the