Some historians , mainly of the late 19th century and before , therefore speculated ( on no evidence ) that he must have traveled overland to the mouth of the Loire or the Garonne .
The Carthaginians had closed the Strait of Gibraltar to all ships from other nations .
Some historians , mainly of the late 19th century and before , therefore speculated ( on no evidence ) that Carthaginians must have traveled overland to the mouth of the Loire or the Garonne .
The Carthaginians had closed the Strait of Gibraltar to all ships from other nations .