Adasaolan then made alliances with Mindanao and Borneo people, and introduced the Mahometan religion into Sulu. Since then, Sulu (called "Jolo," by the Spaniards) has become the Mecca of the Southern Archipelago. [57] The earliest records relating to Mindanao Island, since the Spanish annexation of the Philippines, show that about the year 1594 a rich Portuguese cavalier of noble birth, named Estevan Rodriguez, who had acquired a large fortune in the Philippines, and who had a wealthy brother in Mexico, proposed to the Governor Perez Dasmarinas the conquest of this island. For this purpose he offered his person and all his means, but having long waited in vain to obtain the royal sanction to his project, he prepared to leave for Mexico, disgusted and disappointed. He was on the point of starting for New Spain; he had his ship laden and his family on board, when the royal confirmation arrived with the new Governor, Dr. Antonio Morga (1595-96). Therefore he changed his plans, but despatched the laden ship to Mexico with the cargo, intending to employ the profits of the venture in the prosecution of his Mindanao enterprise. With the title of General, he and his family, together with three chaplain priests, started in another vessel for the south. They put in at Otong (Panay Is.) on the way, and left there in April, 1596. Having reached the great Mindanao River (Rio Grande), the ship went up it as far as Buhayen, in the territory of the chief Silongan. A party under Juan de la Jara, the _Maestre de Campo_, was sent ashore to reconnoitre the environs. Their delay in returning caused alarm, so the General buckled on his shield, and, with sword in hand, disembarked, accompanied by a Cebuano servant and two Spaniards, carrying lances. On the way they met a native, who raised his _campilan_ to deal a blow, which the General received on his shield, and cut down the foe to the waist. Then they encountered another, who clove the General's head almost in two, causing his death in six hours. The Cebuano at once ran the native through with a lance. This brave was discovered to be the youngest brother of the chief Silongan, who had sworn to Mahomet to sacrifice his life to take that of the Castilian invader. The General's corpse was sent to Manila for interment. The expedition led by the _Maestre de Campo_ fared badly, one of the party being killed, another seriously wounded, and the rest fleeing on board. The next day it was decided to construct trenches at the mouth of the river, where the camp was established. The command was taken by the _Maestre de Campo_, whose chief exploit seems to have been that he made love to the deceased General's widow and proposed marriage to her, which she indignantly rejected. Nothing was gained by the expedition, and after the last priest died, the project was abandoned and the vessel returned to Cebu.