Development of the New Testament canon a novelty in Irenaeus's time. "Against Heresies" 3.11.7 acknowledges that many heterodox Christians use only one gospel while 3.11.9 acknowledges that some use more than four. The success of Tatian's Diatessaron in about the same time period is "...a powerful indication that the fourfold Gospel contemporaneously sponsored by Irenaeus was not broadly, let alone universally, recognized." Irenaeus apparently quotes from 21 of the New Testament books and names the author he thought wrote the text. He mentions the four gospels, Acts, the Pauline epistles with the exception of Hebrews and Philemon, as well as the first epistle of Peter, and
Aramaic New Testament Translations Made from the Original Aramaic Gospels", and including the widely known "Our Translated Gospels". Additional evidence for the Aramaic origin is presented by Edwin Abbott in his Diatessarica series. George Lamsa's translation of the Peshitta New Testament from Syriac into English brought the claims for primacy of the Aramaic New Testament to the West. However, his translation is poorly regarded by most scholars in the field. The Old Syriac Texts, the Sinai palimpsest and the Curetonian Gospels, have also influenced scholars concerning original Aramaic passages. Diatessaronic texts such as the Liege Dutch Harmony, the Pepysian Gospel Harmony, Codex Fuldensis,