Columbia subject headings:
Harvard subject headings:
Brazil--Politics and government--1822-1889.
Rio Grande do Sul (Brazil : State)--Politics and government--19th century.
Slavery--Brazil--Rio Grande do Sul--History--19th century.
Princeton subject headings:
Antislavery movements--Brazil--Rio Grande do Sul--History--19th century--Sources.
Rio Grande do Sul (Brazil)--Politics and government--19th century--Sources.