 Pegado called this place Sena, and it is this Portuguese town after which the "Sena people" take their name.The gold trade was lucrative, and of interest to both Arab traders and the Portuguese.By 1542, the Arabs who were established in northeast Africa, the Horn of Africa and along the Swahili coast regions of Africa had established alternate routes for the gold, bypassing the Portuguese towns in Mozambique coast and the Island of Mozambique.