Bibliographical sources mentioned in this text:
Adonis 38.5
Ammonius 38.5
Ausonius 38.2, 38.6
Belleforest : Cosmography 38.7
Bouchet, Ioannes : Chronicle of Aquitania 38.7
Cæsar 38.2
Haye, Ioannes de la 38.8
Marcellinus, Ammianus 38.2
Pinetus, Antonius : Description of Cities 38.8
Plinius 38.2, 38.6
Ptolemæus 38.2, 38.6
Rogerius, Petrus is mentioned in the cartouche of the Poitou map as its maker Ort38
Strabo 38.2
Thevet : Cosmography 38.8