Thanks, GF. The paper seems reasonable to me and with an effort to be fair with dates.
I’d place Mark earlier than it does, and I’m not real sure I’d say Mark was copied as I’d say that they all had access to the same sources....notes, perhaps, taken by those who accompanied Jesus.
The following is evidence that notes were a real thing in that era:
***23 Then he called two of his centurions and ordered them, “Get ready a detachment of two hundred soldiers, seventy horsemen and two hundred spearmen to go to Caesarea at nine tonight. 24 Provide mounts for Paul so that he may be taken safely to Governor Felix.” 25 He wrote a letter as follows: 26 Claudius Lysias, To His Excellency, Governor Felix: Greetings. 27 This man was seized by the Jews and they were about to kill him, but I came with my troops and rescued him, for I had learned that he is a Roman citizen.***
The same man did a very good, in my opinion, transaltion and examination of The Didache (The Teaching). It is at: http://bswett.com/1998-01Didache.html
His closing paragraph: Certainly Barnabas and Paul were “The Apostles to the Gentiles.” If the Didache is a sample of their teaching, as it certainly seems to be, then it must be dated no later than AD 49 because that was when they went their separate ways. The most probable date is either AD 44 or AD 47. In either case, those dates are earlier than anything in the New Testament. Therefore, I believe the Didache is the earliest Christian document we have. Although rightly regarded as a church handbook and not a Gospel or absolutely based on the teachings of Jesus, it provides valuable insights concerning the moral doctrines, theology, rituals, esoteric operations and congregational testing of apostles and prophets, and the basic organization of First Century Christianity.