QUIROS, Agustin de (ke'-ros), Spanish missionary, born in Andujar in 1566; died in Mexico, 13 December, 1622. After serving as attorney of the Inquisition in Seville, Cordova, and Granada, he went to South America, and was attached to the missions of Yucatan. He became afterward rector of the Jesuit college in the city of Mexico, and in 1611 was elected visitor of the missions of New Spain, which office he held till his death. His efforts were always directed toward benefiting the country and developing its resources, and he also showed kindness to the Indians, prohibiting the imposition of heavy labor upon them in the missions under his jurisdiction, building schools, convents, and monasteries, and endeavoring to preserve the monuments of Aztec civilization. He wrote commentaries on different books of the Bible (Seville, 1632-'3), and left in manuscript "Historia verdadera de la Conquista de Mexico," which, it is said, discloses important facts that are not generally known. The latter is in the archives of Mexico.