Strabo Geography 3.1.8

[8] Next to these is Mellaria, ¹ where they make salted provisions. After this the city and river ² of Belo. Here the merchandise and salted provisions for Tingis in Maurusia are principally shipped. There was a city named Zelis ³ near to Tingis, but the Romans transferred it to the opposite coast [of Spain], and having placed there in addition some of the inhabitants of Tingis, and sent over also some of their own people, they then gave to the city the name of Julia Joza. ⁴ Beyond this is Gadeira, ⁵ an island separated from Turdetania by a narrow strait, and distant from Calpe about 750 stadia, or, as others say, 800. This island has nothing to distinguish it above others, but owing to the boldness of its people in their expeditions by sea, and their friendship with the Romans, has attained to that pitch of good fortune, that although situated at the farthest extremities of the earth, it possesses a greater celebrity than any other island. But we will describe it when we come to speak of the other islands.