Development of the New Testament canon day called that of the sun" (Sunday) alongside the "writings of the prophets." A defined set of four gospels (the "Tetramorph") was asserted by Irenaeus, "c". 180, who refers to it directly. By the early 3rd century, Origen may have been using the same twenty-seven books as in the present New Testament canon, though there were still disputes over the acceptance of the Letter to the Hebrews, James, II Peter, II John, III John, Jude and Revelation, known as the Antilegomena. Likewise, the Muratorian fragment is evidence that, perhaps as early as 200, there existed a set of Christian writings
New Testament that there is not one sentence in the New Testament in which the [manuscript] is wholly uniform." Most of the variation took place within the first three Christian centuries. By the 4th century, textual "families" or types of text become discernible among New Testament manuscripts. A "text-type" is the name given to a family of texts with similar readings due to common ancestors and mutual correction. Many early manuscripts, however, contain individual readings from several different earlier forms of text. Modern texual critics have identified the following text-types among textual witnesses to the New Testament: The Alexandrian text-type is usually