Since Erasmus could not find a manuscript which contained the entire Greek Testament, he utilized several for various parts of the New Testament. For most of the text he relied on two rather inferior manuscripts from a monastic library at Basle, one of the Gospels
and one of the Acts and Epistles, both dating from about the twelfth century. Erasmus compared them with two or three others of the same books and entered occasional corrections for the printer in the margins or between the lines of the Greek script. For the Book of Revelation he had but one manuscript, dating from the twelfth century, which he had borrowed from his friend Reuchlin. Unfortunately, this manuscript lacked the final leaf, which had contained the last six verses of the book. For these verses, as well as a few other passages throughout the book where the Greek text of the Apocalypse and the adjoining Greek commentary with which the manuscript was supplied are so mixed up as to be almost indistinguishable, Erasmus depended upon the Latin Vulgate, translating this text into Greek. As would be expected from such a procedure, here and there in Erasmus self-made Greek text are readings which have never been found in any known Greek manuscript-but which are still perpetuated today in printings of the so-called Textus Receptus of the Greek New Testament.
Even in other parts of the New Testament Erasmus occasionally introduced into his Greek text material taken from the Latin Vulgate. Thus in Acts ix. 6, the question which Paul asks at the time of his conversion on the Damascus road, And he trembling and astonished said, Lord, what wilt thou have me to do?, was frankly interpolated by Erasmus from the Latin Vulgate. This addition, which is found in no Greek manuscript at this passage (though it appears in the parallel account of Acts xxii. 10), became part of the Textus Receptus, from which the King James version was made in 1611 (Metzger 1992:99-100).