Here begins our difficulty: how did they get so many copies? There was an organised book-trade in the ancient world; publishers had their offices, using (instead of printing-presses) slaves who were trained in copying; they had shorthand writers, as well as calligraphers to do the fine writing. But as long as Christianity was still an oppressed religion it is doubtful if the Bible was among the books which publishers would care to take. The Christians were, most of them, poor people who could not spend much money for procuring Bibles. Besides, it was no easy thing to get a complete Bible. At that time the books were still written on papyrus rolls, not in book form. Only one side of the papyrus could be used; the roll would become unwieldy if too long. So, in order to get all the books of the Old and the New Testament, at least two dozen rolls had to be written. Maybe a simple Christian copied for himself one gospel or some letters or even one or more books from the Old Testament. There are preserved on papyrus some unfinished attempts which show what hard work it was (Plate I). We can scarcely imagine a man going with this heavy hand through all the books of the Bible. [Illustration: PLATE I--HARVARD PAPYRUS An attempt to copy the letters of St. Paul (Romans counts as A = first letter) giving the text only unto Romans 1 : 7; late third or early fourth century. From Oxyrhynchus Papyri, Vol. II, PI. II, Egypt Exploration Fund--London.] We are told that wealthy Christians helped their brethren by procuring copies for them. Origen, the greatest Bible scholar of the ancient church, is said to have been supported by a rich admirer, who put at his disposal a number of slave copyists. With their help he succeeded in creating one of the greatest works which Bible criticism ever undertook, his so-called Hexapla, which is a comparison of more than six various Greek translations of the Old Testament. Scholars in the nineteenth century held that scarcely more than one copy of this enormous work had ever been written, but by recent discoveries we know that it was copied several times (Plate II). A later admirer of Origen, Pamphilus, is said always to have carried with him several rolls in order to provide poor brethren. Now that was the third century. Christianity had already begun to spread among the higher classes and to become a feature in the world's life.