had established the ranching industry in the New World and had begun 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. Most cattle driving routes in the United States were shorter. For example, early 19th-century Pennsylvania cattle drovers travelled to Philadelphia on the Conestoga Road and Lancaster Pike, which ended near the present site of 30th Street Station. 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. As early as 1836, ranchers in Texas began to drive cattle along a "Beef Trail" to New Orleans. In the 1840s, cattle drives expanded northward into Missouri. The towns of Sedalia, Baxter Springs, Springfield, and St. Louis became principal markets. The Shawnee Trail, also known as the Texas Road or Texas trail, played a significant role in Texas as early as the 1840s. But by 1853, as 3,000 cattle were trailed through western Missouri, local farmers blocked their passage and forced herds to turn back because the Longhorns carried ticks that carried Texas fever. Texas cattle were immune to this disease; but the ticks that they left behind infected the local cattle. By 1855 farmers in western and central Missouri formed vigilance committees, stopped some of the herds, killed any Texas cattle that entered their counties, and a law, effective in December of that year, was passed, banning diseased cattle from being brought into or through the state. Therefore, drovers took their herds up through the eastern edge of Kansas; but there, too, they met opposition from farmers, who induced their territorial legislature to pass a protective law in 1859. During the 1850s, emigration and freighting from the Missouri River westward also caused a rise in demand for oxen. In 1858, the firm of Russell, Majors and Waddell utilized about 40,000 oxen. Longhorns were trained by the thousands for work oxen. Herds of longhorns also were driven to Chicago, and at least one herd was driven all the way to New York. The gold boom in California in the 1850s also created a demand for beef and provided people with the cash to pay for it. Thus, though most cattle were obtained from Mexico, very long drives were