In the 2nd and 3rd centuries Eusebius's Ecclesiastical History 6.38 says the Elchasai "made use of texts from every part of the Old Testament and the Gospels; it rejects the Apostle (Paul) entirely"; 4.29.5 says Tatian the Assyrian rejected Paul's Letters and Acts of the Apostles; 6.25 says Origen accepted 22 canonical books of the Hebrews plus Maccabees plus the four Gospels, one epistle of Peter "perhaps also a second, but this is doubtful," the apocalypse of John, by John an "epistle of very few lines; perhaps also a second and third", and the epistles of Paul who "did not so much as write to all the churches that he taught; and even to those to which he wrote he sent but a few lines." In all, Origen's canon is suggested to be identical to that of Athanasius. Marcion may have been the first to have a clearly defined list of New Testament books, though this question of who came first is still debated. The compilation of this list could have been a challenge and incentive to emerging Proto-orthodoxy; if they wished to deny that Marcion's list was the true one, it was incumbent on them to define what the true one was. The expansion phase of the New Testament canon thus could have begun in response to Marcion's proposed limited canon. Muratorian fragment The Muratorian fragment is the earliest known example of a defined list of mostly New Testament books. It survives, damaged and thus incomplete, as a bad Latin translation of an original, no longer extant, Greek text that is usually dated in the late 2nd century, although a few scholars have preferred a 4th-century date. This is an excerpt from Metzger's translation: This is evidence that, perhaps as early as 200, there existed a set of Christian writings somewhat similar to what is now the 27-book NT, which included four gospels and argued against objections to them. Alogi There were those who rejected the Gospel of John (and possibly also Revelation and the Epistles of John) as either not apostolic or as written by the Gnostic Cerinthus or as not compatible with the Synoptic Gospels. Epiphanius of Salamis called these people the Alogi, because they rejected the Logos doctrine of John and because he claimed they were illogical. There may have also been a dispute over the doctrine of the Paraclete. Gaius or Caius, presbyter of Rome