Columbia subject headings:
Filibusters.
Nicaragua--History--Filibuster War, 1855-1860.
Walker, William, 1824-1860.
Harvard subject headings:
Filibusters.
Nicaragua--History--Filibuster War, 1855-1860.
Walker, William, 1824-1860.
Princeton subject headings:
Filibusters.
Nicaragua--History--Filibuster War, 1855-1860.
Walker, William, 1824-1860.