Long-distance cattle driving was traditional in Mexico, California and Texas, and horse herds were sometimes similarly driven. The Spaniards had established the ranching industry in the New World, and began driving herds northward from Mexico beginning in the 1540s. Small Spanish settlements in Texas derived much of their revenue from horses and cattle driven into Louisiana, though such trade was usually illegal. Cattle driving over long distances also took place in the United States, although infrequently. Relatively long-distance herding of hogs was also common. In 1815 Timothy Flint "encountered a drove of more than 1,000 cattle and swine" being driven from the interior of Ohio to Philadelphia.