Columbia subject headings:
Brazil--History--Empire, 1822-1889.
Slavery--Brazil.
Slaves--Emancipation--Brazil.
Harvard subject headings:
Brazil--History--Empire, 1822-1889.
Slavery--Brazil
Slaves--Emancipation--Brazil
Princeton subject headings:
Brazil--History--Empire, 1822-1889.
Slavery--Brazil.
Slaves--Emancipation--Brazil.