10 Downing Street - Viscount Palmerston: Biography of Viscount Palmerston, Prime Minister 1855-8; 1859-65.
Henry Temple, 3rd Viscount Palmerston: Entry at Wikipedia.
Palmerston Papers: The papers of Henry John Temple, third Viscount Palmerston, form part of University of Southampton Library MS 62, the Broadlands archives.
The Spanish Marriage Crisis Of 1846-47: Extracts from letter of Lord Palmerston to the Marquess of Normanby, British Ambassador in Paris, delivered to the French foreign office.