The Infancy Gospel of James can be confidently ascribed to the early second century for several reasons: it betrays little direct knowledge of Judaism and Israeli geography, indicating it was written by a non-jew past the first couple Christian generations; the author shows vast interest in Mary and her perpetual virginity, though his mariology is not very developed. He also tries to ‘fill in the blanks’ for certain questions that had arisen by the second century, such as “who were Jesus’ brothers?”. He says they were children of Joseph from a former marriage.
It is as historically valuable as a “Superman” comic, a DVD of “The Simpsons”, or the last five minutes of “Planet of the Apes”.
All of those things are interesting as evidence of US culture, but none of them is of the any value as a recital of historical fact - “Planet of the Apes” contains evidence which favours the hypothesis that the Statue of Liberty was a monument familiar to people in the USA in 1967 (when the film was made) - but it is worthless as evidence for the biography of Tyler the astronaut, or for his journey through time, because Tyler the astronaut, & his journey, are both fictitious - they have no more historical reality than Bilibo the hobbit. The only biographies those five minutes illustrate at all are those of Charlton Heston & Kim Novak.
The Protevangelium is of the same sort of historical value - it tells us what a part of the Church thought about certain Christian things at a particular date. But as an account of the BVM’s life, or as evidence of Jewish cultic practices, it is worthless - it even manages to name as High Priest someone who was not High Priest. No doubt somebody in years to come will use “The West Wing” as solid evidence for the existence of a President Bartlet, and will account somehow for the difficulty that the supposed President was in office during the tenure of Presidents already known to exist as historical figures.
bible-history.com/HighPriests/NTHIGHPRIESTSList_of_Jewish_High_Priests.htm
17. Jesus, son of Phiabi, ? -22 B.C.
18. Simon, son of Boethus, 22-5 B.C.
19. Matthias, son of Theophilus, 5-4 B.C.
20. Joseph, son of Elam, 5 B.C.
21. Joezer, son of Boethus, 4 B.C.
22. Eleazar, son of Boethus, 4-1 B.C. - (Appointed by Herod Archelaus)
23. Jesus, son of Sie, 1 - 6 A.D.
24. Annas, 6-15 A.D. (Appointed by Quirinius)
25. Ishmael, son of Phiabi I, 15-16 A.D.
Compare that with the Protevangelium
No rational person would publish a history of the “Daily Planet” and its named staff using the Superman comics as a source, because the Daily Planet, like its editor, anchorman, and other employees, has no existence outside the Superman story. One cannot use fiction as evidence of the historical accuracy of that fiction. ##
The Didache on the other hand is a different story all together.
Many scholars have dated it at very opposite ends: some relegating it to the 4th century, others to the late 1st. But in very recent times, a growing school, including me, sees it as being much earlier than anyone could have previously imagined.
It seems to tell of a time when Christianity had “prophets” as well as Apostles. This is similar to situations Paul speaks of in Corinthians. The Didache is a Christian instruction manual particularly aimed at Gentile converts. It exemplifies a Christianity fully entrenced in Jewish culture, trying to figure out how to expand and allow non-jews into the fold. This recalls the famous Council of Jerusalem in the Book of Acts where Peter and James decide on whether gentiles must become Jews before becoming Christians. Thus I would date the Didache to the year 50 AD or earlier, composed even before many books of the New Testament! Crazy.