 In this codex the place of the Four Gospels is taken by a harmony of the Gospels, or as he himself terms it in the preface, a single Gospel composed from the four.Victor was not certain that the harmony he used was identical with the "Diatesseron" of Tatian.The discovery of the text of the latter work and recent investigation have made it clear that this Latin harmony used by Victor was drawn up about A.D. 500.