7. We are now prepared to consider the testimonies of an earlier period. Here _Justin Martyr_ is a very weighty witness, since he lived so near the apostolic age, and had every facility for investigating the history of the gospel narratives. He was born near the beginning of the second century, and his extant works date from about the middle of the same century. Before his conversion to Christianity he was a heathen philosopher earnestly seeking for the truth among the different systems of the age. Of his undoubtedly genuine works, there remain to us two Apologies (defences of Christianity) and a Dialogue with Trypho a Jew, designed to defend the Christian religion against its Jewish opponents. In these he quotes the gospel of Matthew very abundantly; next in number are his quotations from Luke. His references to Mark and John are much fewer, but enough to show his acquaintance with them. He never quotes the evangelists by name, but designates their writings as "The Memoirs of the Apostles;" and more fully, "The memoirs which I affirm to have been composed by his"--our Lord's--"apostles and their followers," Dialog., ch. 103, "which," he elsewhere says, "are called gospels," Apol. 1. 66, and in a collective sense, "the gospel," Dialog., ch. 10. It should be carefully noticed that he speaks in the plural number both of the apostles who composed the gospels and their followers. This description applies exactly to our canonical gospels--two written by apostles, and two by their followers.