Columbia subject headings:
Denmark--Foreign relations--Great Britain.
Denmark--History--Frederick VII, 1848-1863.
Great Britain--Foreign relations--Denmark.
Schleswig-Holstein War, 1848-1850.
Harvard subject headings:
Denmark--Foreign relations--Great Britain.
Denmark--History--Frederick VII, 1848-1863.
Great Britain--Foreign relations--Denmark.
Schleswig-Holstein War, 1848-1850.
Princeton subject headings: