 Codex Alexandrinus contains the Epistle of Athanasius on the Psalms to Marcellinus , it cannot be considered earlier than A.D. 373 , and it is terminus post quem . In the Acts and Epistles we cannot find such chapter divisions , whose authorship is ascribed to <unk> , Bishop of Sulci , come into vogue before the middle of the fifth century . It is terminus ad quem . The presence of Epistle of Clement , which was once read in Churches recalls to a period when the canon of Scripture was in some particulars not quite settled . It is certain that the writing of the manuscript appears to be somewhat more advanced than that of the Vaticanus or Sinaiticus , especially in the enlargement of initial letters . It is also more decorated , though its ornamentations are already found in earlier manuscripts . 
