NTTC MARK 16:9-20: Were These Twelve Verses Written by Mark?

First, there is the telling fact that two of the oldest and most highly respected Bible manuscripts, the Vaticanus 03 and the Sinaiticus 01, do not contain this section; they conclude Mark’s Gospel with verse eight. This is true of the early versions as well: Syriac, Coptic, Armenian, and Georgian. The early church fathers, Clement, Origen, Cyprian, and Cyril of Jerusalem had no knowledge of anything beyond verse eight.