Book excerpt: To be sure, the dramatic shift in land and resources greatly affected the Mexican, but it had its effect on the Anglo American as well. After the 1820s, many of the Anglo-American pioneers changed from buckskin-clad farmers to cattle ranchers who wore boots and "cowboy" hats. They learned to ride heavy Mexican saddles mounted on horses taken from the wild mustang herds of Texas. They drove great herds of longhorns north and westward, spreading the Mexican life-style and ranch economy as they went. With the cattle ranch went many words, practices, and legal principles that had been developed long before by the native Mexicans of Texas - the Tejanos.