This myth had its origins in the reports of the explorations of Hernando De Soto. De Soto was the governor of Cuba and was given a license by the Spanish King to explore “Florida,” which was the name applied to the essentially unknown land north of Cuba which had been discovered by Ponce de León in 1513. De Soto set sail in May, 1539, landing in today’s Tampa Bay with 600 men. He explored to the north and then west, discovering the Mississippi River in May 1541. De Soto died the following year, with the survivors of his expedition sailing down the Mississippi and then along the coast to Spanish settlements in today’s Mexico.