In the summer of 1797, he left on his third trip to Texas with a wagon train of trade goods, which he successfully brought to La Villa de San Fernando de Béxar, Spanish Texas (now San Antonio, the seat of Bexar County), where he insinuated himself in Spanish Texas society. Commandant General Pedro de Nava was ordered by the viceroy to deal with Nolan, but Governor Muñoz defended Nolan and provided him with safe conduct out of Texas. Nolan left Texas and came back to Natchez in the autumn of 1799 with more than 1,200 horses.