[19] See 3.
[20] Mentioned in Porphyry's Life of Pythagoras, 48, living under Nero.
[21] Living under Tiberius, see Suetonius, Life of Tiberius, 14.
[22] See vi. 5.
[23] See 17.
[24] See 18.
[25] See 17.
[26] See ii. 3. 17.
[27] See 23.
[28] The fragments of all this are probably the Principles of the Theory of the Intelligibles, by Porphyry.