[19] Varro, De Ling. Lat. v. 42.

[20] Smith's Roman Mythology.

[21] Vitruvius, iv. 7, 1.

[22] Pliny, xxxv. 12.

[23] Pliny, vii. 39.

[24] Livy, vii. 3.

[25] Pliny, xxxiii. 18.

[26] Pliny, xxxvi. 5.

[27] Tacitus, Hist. iii. 74.

[28] Tacitus, Hist. iv. 53.