ULLOA, Francisco de, Spanish explorer, died on the Pacific coast in 1540. He went to Mexico with Hernan Cortes, and did good service in the fleet that the latter constructed on Lake Texcoco for the siege and capture of the city of Mexico. Of his later life little is known, except that when Cortes, on his return from Spain, resolved to make new conquests on the northern Pacific coast, he constructed in Acapulco the ship "Santa Agueda," of which he gave the command, together with that of two caravels, to Ulloa, with orders to explore the coast as far northward as possible, and to obtain all the necessary information about the country. Ulloa sailed from Acapulco on 8 July, 1539, entered on 28 August the Gulf of California, where he lost a vessel in a storm, and, after putting for repairs into the Bay of Santa Cruz, which he left on 12 September, discovered Cape Rojo, San Andres and Santa Marta (now Cape Tosco), San Lazaro and San Eugenio, and the island of Cedros or Cerros. After despatching a messenger to Cortes, who had meanwhile sailed for Spain, Ulloa set out again for the north. On 5 April, 1540, he parted company with his consort, which arrived safely at Santiago toward the end of April. Some assert that he was never heard of afterward, but others say that he advanced fifty miles farther than Cape San Quentin, 30. 30' north latitude, and anchored safely at Acapulco on 30 May following. The latter narratives state that he was killed shortly afterward by a soldier whom he had slighted. The journal of the expedition, written by his clerk, Francisco Preciado, under the title "]Relacidn de los descubrimientos, hechos por Don Francisco de Ulloa en un viage por la Mar del Morte, en el navio Santa Agueda." was preserved in the archives of Seville and translated into Italian by Ramusio in the third volume of his "Voyages," and into English by James Burney in his "History of the Discoveries in the South Sea " (London, 1803), under the title " The Voyage of the Right Worshipful Knight Francisco de Ulloa, with Three Ships, set forth at the Expense of the Right Noble Fernando CortSs, Marquis del Valle, by the Coast of Nueva Galicia, Culiacan, into the Gulf of California, called el Mar Berniego, as also to the West of Cape California as far as 30 degrees North, begun from Acapulco, the 8th of July, 1539."