Oral gospel traditions called the M source for Matthew and the L source for Luke, which may have been a mix of written and oral material (see Two-source hypothesis). Most scholars believe that the author of John's gospel used oral and written sources different from those available to the Synoptic authors – a "signs" source, a "revelatory discourse" source, and others – although there are indications that a later editor of this gospel may have used Mark and Luke. Oral transmission may also be seen as a different approach to understanding the Synoptic Gospels in New Testament scholarship. Current theories attempt to link
Aramaic New Testament Testament (particularly the Gospel of Matthew and Gospel of Mark) may have had Aramaic source texts which are no longer extant. The most noteworthy advocate of the "Peshitta-original" hypothesis in the West was George Lamsa of the Aramaic Bible Center. A tiny minority of more recent scholars are backers of the Peshitta-original theory today, whereas the overwhelming majority of scholars consider the Peshitta New Testament to be a translation from a Greek original. For instance the noted Assyriologist Sebastian Brock wrote: Some advocates of the "Peshitta-original" theory also use the term "Aramaic primacy", though this is not used in academic