 Governor of the Mexican provinces of Coahuila and Texas, Marqués de San Miguel de Aguayo, in 1720 passed through on an expedition that brought goats, 2800 horses and 6400 sheep that was the onset of Spanish ranching in Texas.Pedro de Rivera y Villalón crossed the county in 1727 as part of an expedition to inspect the frontier defenses of New Spain.Antonio Rivas was the first known rancher on the land in 1765.