I. Life prefixed to the commentary of Valerius Probus.
II. Life by Suetonius, originally prefixed to the commentary by Aelius Donatus, and usually attributed to him.
III. Life prefixed to the commentary of Servius.
IV. Life taken from the mss. known as Bernenses 172 (saec. X), 167 (saec IX-X). Essay on the poetry of Vergil in connection with his life and times.