In 1770, the slave Esperança Garcia bravely penned a letter to the governor of Piauí state, in Brazil, describing how she and her children were being mistreated and requesting permission to return to the farm where the rest of her family was living. Before she wrote her letter, Esperança Garcia lived on a cotton farm run by Jesuit priests, where she learned to read and write — a rare opportunity for a woman, especially a slave.