A rostrum, ship beak, from a tomb monument just outside of Porta Marina in Ostia.
"Gaius Caesar, having slipped as he was about to embark on ship, exclaimed: "I hold thee fast, Mother Earth." By this interpretation of the incident he made it seem that he was destined to come back to the lands from which he was setting out"
Frontinus - Stratagems XII
Translated by Charles E. Bennett