1 Propertius, IV, i, 70.

2 Catullus, XLIII, 8.

3 Horace, ibid., II, ii, 120.

4 Martial, Epigrams, VIII, dedication to the Emperor Domitian.

5 Virgil, Georgics, V, 194.

6 Horace, Ars poetica, 343.

7 Marcus Annaeus Seneca, Suasiorae, VIII.

8 Tacitus, Oratores, XVIII.

9 Cicero, De Senectute, X, 32.

10 Suetonius, Life of Caesar, LVI.

11 Jean Bodin, Methodus ad facilem historiarum cognitionem, Paris, 1566.