Bibliographical sources as mentioned in this text:
Dion 83.2
Emmius, Ubbo 83.14
Florianus, Ioannes is mentioned in the cartouche of the first East Frisia map as its maker, Ort83
Kempius 83.10
Paterculus 83.2
Plinius : First Chapter of his sixteenth book 83.2, 83.5, 83.7
Ptolemæus 83.2
Spatianus, Æl. 83.2
Strabo 83.2
Suetonius 83.2