In 1911 the Pontifical Biblical Commission issued the decision that Matthew is the true author of the Gospel published under his name; the Gospel was originally written in Hebrew before the destruction of Jerusalem. [From *What Does The Church Really Say About The Bible, Edith Myers, The Wanderer Press, 1979].
Even Adolf von Harnack, a rationalist historian of high repute among Rationalist and Protestants, wrote that the Synoptic Gospels were written before 70 A.D. – before the fall of Jerusalem, and accepted the tradition that St Luke derived his information on the infancy of Jesus from Mary His Mother. Theologische Quartalsch, Tubingen 1929, IV, p 443-4].
[See Sheehan/Joseph, *Apologetics and Catholic Doctrine, The Saint Austin Press, 2002, p 89, 93]
Not only are the facts of Jesus’ miracles recorded by His own Apostles who were present – Saints Matthew and John were companions of Christ, and Saints Mark and Luke lived in constant contact with His contemporaries.
Very revealing is The Hebrew Christ, Claude Tresmontant, Franciscan Herald Press, 1989, on the origins and dating of the Gospels. As Bishop John Charles Thomas writes in the foreword: “There is nothing in the least unscientific in postulating that there was only a brief period of oral transmission before some of the Gospel materials began to be set down.”