Columbia subject headings:
Harvard subject headings:
Africa, West--Description and travel.
Africa, West--Discovery and exploration.
Lander, John, 1807-1839--Travel--Africa, West.
Lander, Richard, 1804-1834--Travel--Africa, West.
Niger River--Description and travel.
Niger River--Discovery and exploration.
Niger River.
Princeton subject headings:
Africa, West--Description and travel--19th century.
Niger River--Description and travel--19th century.
Voyages and travels.