The AD33 crucifixion detail in Judea

[ANTONIVS MAGNVS]

Just a thought, why would you assume they were illiterate? Many were fisherman it's true but if you read the context they were successful fishermen who ran a business and had hired hands. Just because many ancient people were illiterate doesn't mean that all or some of the apostles were illiterate. Matthew was a tax collector, Luke may have been a physician.

Ancient tradition says that Peter provided the basic information for Mark’s Gospel when they were together in Babylon. (1Pe 5:13) Origen says that Mark composed his Gospel “in accordance with Peter’s instructions.” (The Ecclesiastical History, Eusebius, VI, XXV, 3-7)and Tertullian says that the Gospel of Mark “may be affirmed to be Peter’s, whose interpreter Mark was.” (The Ante-Nicene Fathers, Vol. III, p. 350) Eusebius gives the statement of “John the presbyter” as quoted by Papias (c. 140 C.E.): “And the Presbyter used to say this, ‘Mark became Peter’s interpreter and wrote accurately all that he remembered, not, indeed, in order, of the things said or done by the Lord. . . . Mark did nothing wrong in thus writing down single points as he remembered them. For to one thing he gave attention, to leave out nothing of what he had heard and to make no false statements in them.’”—The Ecclesiastical History, III, XXXIX, 12-16