Columbia subject headings:
Ferreira, Manuel dos Anjos, active 1839.
Maranhão (Brazil)--History.
Slavery--Brazil.
Harvard subject headings:
Maranhão (Brazil)--History--Balaiada Revolt, 1838-1841.
Slave insurrections--Brazil--Maranhão.
Princeton subject headings:
Ferreira, Manuel dos Anjos, fl. 1839.
Maranhão (Brazil)--History.
Slavery--Brazil--Maranhão.