Columbia subject headings:
Harvard subject headings:
Forced labor--South Africa--Correspondence.
Literacy--South Africa--History.
Miners' writings
Miners--South Africa--Correspondence.
South Africa--Colonization--History.
South Africa--Social life and customs
Princeton subject headings:
Literacy--South Africa--History.
South Africa--Colonization.
South Africa--History--19th century.
South Africa--Social conditions.