Columbia subject headings:
Harvard subject headings:
Explorers--South Africa--Biography.
Isaac, Samuel, 1812-1886.
Isaac, Saul, 1823-1903.
Isaacs, Nathaniel, 1808-
Jewish businesspeople--Great Britain--Biography.
Princeton subject headings:
Explorers--South Africa--Biography.
Isaac, Samuel, 1812-1886.
Isaac, Saul, 1823-1903.
Isaacs, Nathaniel, 1808-
Jewish businesspeople--Great Britain--Biography.