by purchase or trade would also be freed. By 1825, however, a census of Austin's Colony showed 1,347 Anglo-Americans and 443 people of African descent, including a very small number of free African Americans. Two years later the legislature of Coahuila y Tejas outlawed the introduction of additional slaves into the state and granted freedom at birth to all children born to a slave. The new laws also stated that any slave brought into Texas should be freed within six months. In 1829, slavery was officially outlawed in Mexico. Austin feared that the edict would cause widespread discontent and tried to suppress publication of it. Rumors of the new law quickly spread throughout the area and the colonists seemed on the brink of revolt. The governor of Coahuila y Tejas, Jose Maria Viesca, wrote to the president to explain the importance of slavery to the Texas economy, and the importance of the Texas economy to the development of the state. Texas was temporarily exempted from the rule. On April 6, 1830, Mexican president Anastasio Bustamante ordered Texas to comply with the emancipation proclamation or face military intervention. To circumvent the law, many Anglo colonists converted their slaves into indentured servants for life. Others simply called their slaves indentured servants without legally changing their status. Slaveholders wishing to enter Mexico would force their slaves to sign contracts claiming that the slaves owed money and would work to pay the debt. The low wages the slave would receive made repayment impossible, and the debt would be inherited, even though no slave would receive wages until age eighteen. This tactic was outlawed by an 1832 state law which prohibited worker contracts from lasting more than ten years. A small number of slaves were imported illegally from the West Indies or Africa. The British consul estimated that in the 1830s approximately 500 slaves had been illegally imported into Texas. By 1836, there were approximately 5,000 slaves in Texas. Exportation in the slave-owning areas of the state surpassed that of the non-slave-owning areas. A survey of Texas in 1834 found that the department of Bexar, which was mostly made up of Tejanos, had exported no goods. The Brazos department, including Austin's colonies and those of Green DeWitt, had exported 600,000 pesos worth of goods, including 5,000 bales of cotton. The department of Texas, which included the eastern settlements, expected to export 2,000 bales of cotton