To what date does the manuscript belong? There is still extant a letter of the first Christian Emperor Constantine dating from the year 331, in which he asks Eusebius, Bishop of Caesarea in Palestine, to provide him with fifty copies of the Old and New Testament for use in the principal churches of his empire (πεντήκοντα σωμάτια ἐν διφθέραις ἐγκατασκεύοις) and puts two public carriages at the bishop’s disposal for their safe transport. We have also the letter that Eusebius sent along with these Bibles, in which he consigns them ἐν πολυτελῶς ἠσκημένοις τεύχεσι τρισσᾶ καὶ τετρασσᾶ—_i.e._ “in expensively prepared volumes of three and four.” With former scholars Tischendorf understood the expression τρισσᾶ καὶ τετρασσᾶ of the number of sheets in the quires of the manuscripts, as though they had been composed of ternions and quaternions of twelve and sixteen pages respectively. Others took it as referring to the number of columns on the pages, Codex Sinaiticus, which Tischendorf believed to be one of these fifty Bibles, being unique in showing four columns to the page. The most probable explanation of the phrase is, however, that it indicates the number of volumes each Bible comprised, and means that each Bible of three or four parts, as the case might be, was packed in a separate box.[59] Tischendorf, as has been said, saw in Codex Sinaiticus one of these fifty Bibles. He also thought that א was the work of four different scribes, and was confident that one of these, the one who had written only six leaves of the New Testament, was the scribe of Codex Vaticanus. But other authorities bring א down to the beginning of the fifth century. One can understand how it was that Tischendorf was led to overrate the value of this manuscript at first, and to call it by the first letter of the Hebrew alphabet to signify its pre-eminence over all other manuscripts. The claim is so far justified that it is at least one of the oldest manuscripts, and of the oldest the only one that contains the entire New Testament. The order is that of the Gospels, Pauline Epistles (among which Hebrews is found after 2 Thess.), Acts, Catholic Epistles, Apocalypse, after which come Barnabas and Hermas.[60] This same order is observed in the Old Syriac Bible, and in the first printed Greek New Testament, the Complutensian Polyglot. The fact that Barnabas is still tacitly included in the books of the New Testament may be taken equally as indicating the age of א itself or that of the exemplar from which it was copied.[61] Jerome’s recension of Origen’s Lexicon of Proper Names in the Greek New Testament is still extant, and in it Barnabas is cited like the other books. In the Catalogus Claromontanus, which is a very old list of the books of the New Testament, Barnabas is even found before the Apocalypse, an arrangement which is not found again in the succeeding centuries.