Scylax of Caryanda
Scylax of Caryanda (521-485 BC) was a Greek explorer who is best known for his investigation of the River Indus and his long journey back home to report on his 30 month adventures to his patron King Darius I of Persia. It is claimed that this expedition was in preparation for an invasion of India. His activities were recorded by Herodotus in Book IV of his Histories. There is a naval guide to the Mediterranean and its islands, which is attributed to Scylax but dated to 350 BC or later. This document is referred as the Periplus of Pseudo-Scylax. Mention of mud shoals in this periplus have been assumed, by some commentators, to be a reference to the shoals created when Atlantis was submerged.