The Gospel of James, also known as the Infancy Gospel of James or the Protoevangelium of James, is an apocryphal Gospel probably written about A.D. 145, which expands backward in time the infancy stories contained the Gospels of Matthew and Luke, and presents a narrative concerning the birth and upbringing of Mary herself. It is the oldest source to assert the virginity of Mary not only prior to but during (and after) the birth of Jesus. The ancient manuscripts that preserve the book have different titles, including "The Birth of Mary", "The Story of the Birth of Saint Mary, Mother of God," and "The Birth of Mary; The Revelation of James. The document presents itself as written by James: "I, James, wrote this history in Jerusalem."-XXV Thus the purported author is James the Just, whom the text claims is a son of Joseph from a prior marriage, and thus a stepbrother of Jesus. Scholars have established that, based on the style of the language and the fact that the author is not aware of contemporary Jewish customs, while the historical James the Just certainly was, the work is pseudepigraphical (not written by the person it is attributed to). The consensus is that it was actually composed some time in the 2nd century AD. The first mention of it is by Origen of Alexandria in the early 3rd century, who says the text, like that of a "Gospel of Peter", was of dubious, recent appearance and shared with that book the claim that the 'brethren of the Lord' were sons of Joseph by a former wife.