Columbia subject headings:
Fugitive slaves--Brazil--São Pedro (São Paulo)--History.
Slavery--Brazil--São Pedro (São Paulo)--History.
Harvard subject headings:
Fugitive slaves--Brazil--Rio Grande do Sul--History--19th century.
Slavery--Brazil--Rio Grande do Sul--History--19th century.
Princeton subject headings:
Fugitive slaves--Brazil--Rio Grande do Sul--History--19th century.
Slavery--Brazil--Rio Grande do Sul--History--19th century.