Columbia subject headings:
Belgium--Politics and government--1830-1914.
Cabinet officers--Belgium--Correspondence.
Frère-Orban, Hubert Joseph Walter, 1812-1896.
Léopold II, King of the Belgians, 1835-1909--Correspondence.
Harvard subject headings:
Belgium--Kings and rulers--Correspondence.
Belgium--Politics and government--1830-1914.
Cabinet officers--Belgium--Correspondence.
Frère-Orban, Hubert Joseph Walter, 1812-1896--Correspondence.
Léopold II, King of the Belgians, 1835-1909--Correspondence.
Princeton subject headings:
Belgium--Politics and government--1830-1914--Sources.
Education--Belgium--History--19th century--Sources.
Frère-Orban, Hubert Joseph Walter, 1812-1896.
Prime ministers--Belgium--Correspondence.