“…It is not identical to any surviving witness: as Roger Gryson has remarked, it would be extraordinary if any extended citation in a Church Father coincided exactly with one of the few surviving OL manuscripts. 8 Augustine's Adoption of the Vulgate Gospels 453 Nonetheless, not only does it have a broadly similar character to Codex Rehdigeranus, but also almost all Augustine's non-Vg readings in this passage are preserved within the OL tradition, which suggests that the surviving manuscripts constitute a cross-section of different versions in circulation at the end of the fifth century. Five OL witnesses have mandatum rather than praeceptum, and Augustine's text of John 15.12 is identical to one of these, Codex Vercellensis, the only surviving manuscript to include et ego in this verse.…”