31 books
Memoirs and Correspondence of Viscount Castlereagh, Second Marquess of Londonderry, Vol. 1
Memoirs and Correspondence of Viscount Castlereagh, Second Marquess of Londonderry (Volume 9)
Memoirs and Correspondence of Viscount Castlereagh, Second Marquess of Londonderry Volume 8
Memoirs and Correspondence of Viscount Castlereagh, Second Marquess of Londonderry Volume 3