Mark is referred to as follows: "Mark having become the interpreter of Peter, wrote accurately whatever he remembered, though he did not arrange in order the things which were either said or done by Christ. For he neither heard the Lord, nor followed him; but afterwards, as I said, accompanied Peter, who adapted his teaching to the occasion, and not as making a consecutive record of the Lord's discourses" (Ecclesiastical History, book iii, p. 39). This does not describe our Gospel of Mark, which, although a compilation, is a consecutive narrative of events, and not a collection of isolated fragments. But even if Papias was acquainted with the Gospels, he is a poor witness to their credibility, for he accepted the teachings of tradition in preference to the books which he knew: "I held that what was to be derived from books did not profit me as that from the living and abiding voice [tradition]" (Ecclesiastical History, iii, 39). Dr. Davidson admits that the books mentioned by Papias were not our Gospels. He says: "Papias speaks of Matthew and Mark, but it is most probable that he had documents which either formed the basis of our present Matthew and Mark or were taken into them and written over" (Canon of the Bible, p. 124). "He neither felt the want nor knew the existence of inspired Gospels" (Ibid, p. 123). The writings of thirty Christian authors who wrote prior to 170 are still extant. In all these writings there is to be found no mention of the Four Gospels. In the writings of Theophilus, bishop of Antioch, occurs the following: "John says: 'In the beginning was the Word, and the Word was God.'" This was written in 180, after the middle of the latter half of the second century, and is the earliest proof of the existence of any one of the Four Gospels. Irenæus, bishop of Lyons, who wrote about 190, is the earliest writer who mentions all of the Four Gospels. He names them; he declares them to be inspired; he makes four hundred quotations from them. The Four Gospels were in existence when Irenæus wrote, and they were undoubtedly composed between the time of Justin Martyr and the time of Irenæus--that is, some time during the latter half of the second century.