Abstract: A copy of a letter from Henry Willock, HM Chargé d’Affaires in Persia [Iran], to George Canning, Secretary of State for Foreign Affairs, sent from Tabriz and dated 7 December 1823.The letter concerns a rumoured secret agreement between Persia and Russia whereby Russia will guarantee the succession of the Prince Royal [‘Abbās Mīrzā, Crown Prince] to the throne of Persia.The letter was enclosed in Willock’s letter to the Secret Committee of the Court of Directors of the East India Company dated 8 January 1824 (IOR/L/PS/9/69/140).Physical description: 1 item (2 folios)