Texts

De Vita Caesarum, 6.2
C. Suetonius Tranquillus (Suetonius)

Galba, 24.4
Plutarchus (Plutarch)

Historiae, 1.27
Cornelius Tacitus (Tacitus)

Historiae Romanae, 54.8.4
Cassius Dio

Milliarium Aureum
Richardson, L. jr

Naturalis Historia, 3.66
C. Plinius Caecilius (Pliny the Elder)