" the Mexican Congress passed a law suspending immigration from the United States in April 1830. Austin got an exemption from it for his own recruits, and others too found it easy to slip through the border. Mexico suffered the problem of illegal immigration from the United States until Austin’s lobbying in Mexico City helped secure repeal of the ban in November 1833. "

― , What Hath God Wrought: The Transformation of America, 1815 - 1848