 Fifty miles south of Barcelore was Mangalore , the last of the Portuguese strongholds in Kanara , situated on the mouth of the Netravati River . There too the Portuguese built a fortress and alongside it a walled town with accommodation for 35 casados families . Both Barcelore and Mangalore became principal ports for the export of rice and during the first half of the 17th century and supplied the many strategic <unk> that were of significance to the Estado da India , the Portuguese Asian empire . These included , Goa , Malacca , Muscat , Mozambique and Mombasa . ( See Map 1 . ) 
