Strabo

Strabo was a Greek geographer and historian born at Amaseia in Pontus, in northern Anatolia, around 64 BCE. He traveled, studied in Rome and Alexandria, and wrote a large history, now lost, and a Geography in 17 books, which survives almost complete.

The Geography is the only surviving work that covers all the peoples and countries known to Greeks and Romans in the reign of Augustus. Strabo draws on earlier writers, including Eratosthenes and Posidonius, and mixes description with history and local legend.

Two passages matter here. Writing more than three centuries after the event, he reports that the ruins of Helike, the Greek city swallowed by the sea in 373 BCE, were still visible underwater though worn by salt water, and that Eratosthenes had been told of a bronze Poseidon standing in the water, a hazard to fishermen's nets. On Atlantis, he reports the opinion that the writer who invented the island also made it vanish, an early sign that ancient readers doubted the story.