Early in the sixteenth century (1504), he urged the occupation of the Gulf. In 1506 three fleets went to the East under the command of Tristan d'Acunha, with Albuquerque as second in command. Tristan soon took his departure further afield, and left Albuquerque in command. This admiral first attacked and took Hormuz, then governed by a king of Persian origin. Here, and at Maskat, he thoroughly established the Portuguese power, thereby commanding the entrance into the Gulf. From de Barros' account it would appear that the king of Bahrein was a tributary of the king of Hormuz, paying annually 40,000 _pardaos_, and from Albuquerque's letters we read that the occupation of Bahrein formed part of his scheme. 'With Hormuz and Bahrein in their hand the whole Gulf would be under their control,' he wrote. In fact, Albuquerque's scheme at that time would appear to have been exceedingly vast and rather chimerical--namely, to divert the Nile from its course and let it flow into the Red Sea, ruin Egypt, and bring the India trade _via_ the Persian Gulf to Europe. Of this scheme we have only the outline, but, beyond establishing fortresses in the Gulf, it fell through, for Albuquerque died, and with him his gigantic projects. The exact date of the occupation of Bahrein by the Portuguese I have as yet been unable to discover; but in 1521 we read of an Arab insurrection in Bahrein against the Persians and Portuguese, in which the Portuguese factor, Ruy Bale, was tortured and crucified. Sheikh Hussein bin Said, of the Arabian tribe of Ben Zabia, was the instigator of this revolt. In the following year the Portuguese governor, Dom Luis de Menezes, came to terms with him, and appointed him Portuguese representative in the island. A few years later, one Ras Bardadim, _guazil_, or governor of Bahrein, made himself objectionable, and against him Simeon d'Acunha was sent. He and many of his men died of fever in the expedition, but the Portuguese power was again restored. Towards the close of the sixteenth century the Portuguese came under the rule of Spain, and from that date their power in the Persian Gulf began to wane. Their soldiers were drafted off to the wars in Flanders instead of going to the East to protect the colonies; and the final blow came in 1622, when Shah Abbas of Persia, assisted by an English fleet, took Hormuz, and then Bahrein. Twenty years later a company of Portuguese merchants, eager for the pearls of these islands, organised an expedition from Goa to recover the Bahrein, but the ships were taken and plundered by the Arabs before ever they entered the Gulf. Thus fell the great Portuguese power in the Gulf, the sole traces of which now are the numerous fortresses, such as the one on Bahrein.