In an earlier paper, one of the co-authors pointed out that the extant Gospels of Matthew, Mark, Luke and Thomas employed a common source which contained a certain series of parables and sayings of Jesus concerning John the Baptist. The basic structure of this ‘Baptist-sequence’ is best preserved by far in Matthew's Gospel, although various details of the original wording are better preserved in Luke and Thomas. It was suggested that one way of explaining these phenomena was to suppose the existence of a Proto-Matthew, of which the extant Matthew's Gospel contains revisions made in part under the influence of Mark's Gospel.