He left the military when the governor of
Nueva Vizcaya, New Spain, appointed him
Alcalde Mayor (mayor) of
Parras de la Fuente,
Nueva Vizcaya, New Spain (modern Coahuila, Mexico). In 1737 he was appointed Governor of the
province of Texas by the governor of
Nuevo Leon José Fernández de Jáuregui y Urrutia, who had investigated the mismanagement of Governor
Carlos B. Franquis de Lugo in Texas. Little is known about his administration. Osorio reportedly tried to fix all the damage that Franquis de Lugo had done to the missions of
San Antonio. In 1739, an epidemic broke out in Texas, but Prudencio managed to survive. After that, the missions grew and the first stone buildings were built in these locations. After April 1738, the governor devised military campaigns against the
Apache settlements. However, even after signing peace agreements with the Apaches, assaults and "depredations" of this people in Texas continued between June 1738 and September 1739. Places such as the around San Antonio and the port of Cíbolo were attacked by them. He traded with the French, but the settlers complained about it, as trade with the French was illegal. However, when he heard that the French were trading at
lower Trinity or that perhaps they were tried to settle there, in Spanish territory, he sent expeditions to find them, but these failed. Later, he pursued them until he understood that they merely were trying to earn a few
pesos in the forest like any other civilization that was there. In 1739, Governor Orobio y Basterra named modern
Port Aransas as "Aránzazu Pass" on a map he elaborated, because it served Aránzazu fort. Orobio left office between 1740 and 1741, replaced by
Tomás Felipe de Winthuisen. == References ==