Jerome agreed that Old-Latin translation should be revised and corrected, acknowledging the numerous differences between every Latin manuscript such that each one looked like its own version. To remedy the problem, Jerome agreed that they should be corrected on the basis of the Greek manuscripts. Jerome explained why the Old-Latin order of the Gospels (Matthew, John, Luke, Mark) should be changed into the order Matthew, Mark, Luke, John, because it is relevant for the Greek manuscripts.