The immediate successors of Dom João de Castro, Garcia de Sá, Jorge Cabral, Affonso de Noronha, and Pedro de Mascarenhas, found no great perils to meet, since the victory of Diu had terrified the Mohammedans for a time, and none of them left any important traces upon the history of the Portuguese in India. The government of Dom Constantino de Braganza, a scion of the most noble house in Portugal next to royalty, marked a return to the system of Dom João de Castro, whom he imitated not only in his internal reforms, but in his gallantry in the field. He it was who took and occupied Daman, which, with Goa and Diu, remains to this day a possession of Portugal. He was still in office when the death of John III. left the crown of Portugal to a minor, and the greatness of his country, and even its independence, was on the point of disappearing. But the Portuguese power in Asia must not be regarded as being confined to India, though Goa remained its headquarters, and the centre from which the homeward-bound fleets sailed. It will be remembered that Affonso de Alboquerque made expeditions both to the east and west; and his successors, during the century of the Portuguese monopoly of the Asiatic trade, maintained and extended their commercial operations in both directions. But before touching on these extensions attention must be called to the care with which the greatest Portuguese governors kept up the establishments on the south-eastern coast of Africa. Mozambique, which still belongs to Portugal, Mombassa, and Melinda, were all fortified with the utmost science of the time, for the homeward-and outward-bound fleets always paused at one or other or at all of these places before facing or after meeting the perils of the Indian Ocean, in order to refit and take in provisions. The dangers of the passage round the Cape of Good Hope were also sufficiently serious to need rest or preparation, for to mention but two disasters, Francisco de Almeida, the first Viceroy of India was wrecked in Saldanha Bay, and died there on his way back from his command; and a few years after occurred the wreck, imprisonment among the savages, and death of Dom Manoel de Sousa and his wife, which Camoens has immortalized in touching words.[16] More important than these African settlements was the city of Ormuz, at the mouth of the Persian Gulf, which became the headquarters of the Persian trade with Europe by means of the Portuguese fleets. It has been seen that Aden was too strong for Alboquerque to capture; one of his successors, Affonso de Noronha, was more successful in 1551, but he only held the key of the Red Sea for a single year, after which it was recaptured by the Turks.