Origen (~230)
¥Successor to Clement as head of the Christian school in Alexandria, Origen later moves to Caesarea, where he develops the largest Christian library in antiquity.
¥Origen gives some insight into the status of the canon question in his time.  He notes that two categories were commonly recognized by the orthodox:
ÐBooks acknowledged by all Christians (21)
¥4 Gospels, Acts, 13 Paul, 1 Peter, 1 John, Revelation
ÐBooks disputed by some Christians (10)
¥Hebrews, James, 2 Peter, 2-3 John, Jude,
¥Ps-Barnabas, Hermas, Didache, Gospel of Hebrews