Codex Totus

With the existence of codices Alexandrinius (A), Vaticanus (B), and Sinaiticus (Aleph), we can confidently assert that by sometime in the third or fourth century, the Christian Bible was composed of:

Genesis (A, B, Aleph)	Wisdom (B)	Lamentations (B)	1 Thessalonians (A, B, Aleph)
Exodus (A, B)	Ecclesiasticus (B)	Ezekiel (B, Aleph)	2 Thessalonians (A, B, Aleph)
Leviticus (A, B)	Esther (B, Aleph)	Daniel (B, Aleph)	1 Timothy (A, Aleph)
Numbers (A, B, Aleph)	Tobit (B, Aleph)	1 Maccabees (B, Aleph)	2 Timothy (A, Aleph)
Deuteronomy (A, B)	Judith (B, Aleph)	2 Maccabees (B)	Titus (A, Aleph)
Joshua (A, B)	Tobit (B, Aleph)	3 Maccabees (B)	Philemon (A, Aleph)
Judges (A, B)	Hosea (A, B)	4 Maccabees (B, Aleph)	Hebrews (A, B, Aleph)
Ruth (A, B)	Joel (A, B, Aleph)	Matthew (A, B, Aleph)	James (A, B, Aleph)
1 Samuel (A, B)	Amos (A, B, Aleph)	Mark (A, B, Aleph)	1 Peter (A, B, Aleph)
2 Samuel (A, B)	Obadiah (A, B, Aleph)	Luke (A, B, Aleph)	2 Peter (A, B, Aleph)
1 Chronicles (A, B, Aleph)	Johan (A, B, Aleph)	John (A, B, Aleph)	1 John (A, B, Aleph)
2 Chronicles (A, B)	Micah (A, B, Aleph)	Acts (A, B, Aleph)	2 John (A, B, Aleph)
1 Esdras (B)	Nahum (A, B, Aleph)	Romans (A, B, Aleph)	3 John (A, B, Aleph)
2 Esdras (Ezra-Nehemiah) (B, Aleph)	Habakkuk (A, B, Aleph)	1 Corinthians (A, B, Aleph)	Jude (A, B, Aleph)
Psalms (A, B, Aleph)	Zephaniah (A, B, Aleph)	2 Corinthians (A, B, Aleph)	Revelation (A, Aleph)
Proverbs (A, B, Aleph)	Malachi (A, B, Aleph)	Galatians (A, B, Aleph)	Barnabas (Aleph)
Ecclesiastes (A, B, Aleph)	Isaiah (B)	Ephesians (A, B, Aleph)	Shepherd of Hermas (Aleph)
Song of Songs (A, B, Aleph)	Jeremiah (B)	Philippians (A, B, Aleph)
Job (A, B, Aleph)	Baruch (B, A)	Colossians (A, B, Aleph)

 

Reading the list carefully, however, the great uncials (“uncial” refers to the style of calligraphy, or handwriting) include both the Apocrypha and some books that aren’t in the modern canon, such as the Shepherd of Hermas. So clearly there is more to the story than some old, yet more-or-less complete manuscripts: we know which books the early Christians were reading, but not why those and not others.  Nor do we know why some of these books were eventually dropped.