Of Origen, the great Christian Father of the third century, "Chambers' Encyclopedia" says: "Origen doubted the authority of the Epistle to the Hebrews, of the Epistle of James, of Jude, of the Second of Peter, and the Second and Third of John; while, at the same time, he was disposed to recognize as canonical certain apocryphal scriptures, such as those of Hermas and Barnabas." In addition to the apocryphal books named, Origen also accepted as authoritative the Gospel of the Hebrews, Gospel of the Egyptians, Acts of Paul, and Preaching of Peter. The Rev. Jeremiah Jones, a leading authority on the canon, says: "Justin Martyr, Clemens Alexandrinus, Tertullian, and the rest of the primitive writers were wont to approve and cite books which now all men know to be apocryphal" (Canon, p. 4). Theodoret says that as late as the fifth century many churches used the Gospel of Tatian instead of the canonical Gospels. Gregory the Great, at the beginning of the seventh, and Alfric, at the close of the tenth century, accepted as canonical Paul's Epistle to the Laodiceans. Early in the fourth century the celebrated church historian, Eusebius, gave a list of the acknowledged and disputed books of the New Testament. The disputed books--books which some accepted and others rejected--were Hebrews, James, Second and Third John, Jude, Revelation, Shepherd of Hermas, Epistle of Barnabas, Acts of Paul, and Revelation of Peter. Athanasius rejected Esther, and Epiphanius accepted the Epistle of Jeremiah. Cyril, Bishop of Jerusalem, and Gregory, Bishop of Constantinople, both rejected Revelation. Chrysostom, one of the greatest of church divines, and, who gave to the sacred book of Christians its name, omitted ten books from his canon--First and Second Chronicles, Esther, Job, and Lamentations, five books in the Old Testament; and Second Peter, Second and Third John, Jude, and Revelation, five books in the New Testament. Protestant Scholars. Many Protestant scholars have questioned or denied the correctness of the Protestant canon. Calvin doubted Second and Third John and Revelation. Erasmus doubted Hebrews, Second and Third John, and Revelation. Zwingle and Beza rejected Revelation. Dr. Lardner questioned the authority of Hebrews, James, Second Peter, Second and Third John, Jude and Revelation. Evanson rejected Matthew, Mark, Luke, and nearly half of the Epistles. Schleiermacher rejected First Timothy. Scaliger rejected Second Peter. Davidson thinks that Esther should be excluded from the canon. Eichorn rejected Daniel and Jonah in the Old Testament, and Second Timothy and Titus in the New.