Nevertheless, having left San Lúcar de Barrameda on the 18th of September, 1530, with seventy men, Sedeño’s first act after reaching Trinidad was to take formal possession of it and then pass over to the mainland. There, on the Gulf of Paria, he built, outside of his province, and contrary to his commission, the “strong house” which he had contemplated building in Trinidad. This act, apparently insignificant in itself, was of great importance for the future. Sedeño left a small garrison in the “strong house,” and sailed to the Antilles to procure reënforcements. He hoped that he had in the meantime secured undisputed possession of the mainland, even though it was without higher sanction. But without his knowledge a former companion of Cortés, Diego de Ordaz, the same person to whom is ascribed the first ascension of the Mexican volcano Popocatepetl, had obtained in Spain a concession for the colonization of the then very indefinite district of Marañon on the mainland. This concession was granted in 1530, and included permission to occupy the coast from the territory leased to Welser & Co. to the mouth of the Marañon, and to erect four fortresses. An allowance of 725,000 maravedis a year was set aside for him, while he had also an assured income from Mexico of between 6000 and 7000 pesos. Ordaz fitted out two ships and a caravel in Spain at his own cost, and sailed from San Lúcar de Barrameda with four hundred and fifty men on the 20th of October, 1531. Although an additional caravel joined the squadron at the Canary Islands, and the aggregate force was increased to six hundred men, yet, in consequence of heavy storms, the Admiral’s ship was the only vessel that came in sight of the South American coast, near the mouth of the Amazon.[20] Ordaz sailed on thence northward along the coast to Paria, where he found the fort built by Sedeño. He captured this post by assault, regarding it as belonging to his concession, and kept it for a further base of operations. Ordaz thought so little of the region of the mouths of the Amazon and of the coast of southern Guiana that he abandoned all attempts there and decided to turn to the nearer-lying mouths of the Orinoco. He fitted out a flotilla of seven galleys from Paria, with which, with two hundred and eighty men and eighteen horses, to explore the thickly wooded labyrinth of the delta of that river.