Original Royal Warrant for affixing the Great Seal for the “Full Power” granted to Sir Charles Stuart and Henry Chamberlain to conduct commercial and other negotiations with the Emperor of Brazil, signed ‘George R’ by the King upper left, countersigned by George Canning. 5 pp. 12 x 8 inches, tied by blue ribbon, Royal wafer seal affixed. In superb condition. Light horizontal folds. Given at Our Court at Windsor Castle, 2 January 1826. King George IV (reigned 1820-1830). Sir Charles Stuart (1779-1845), diplomat, who was of great service to the Duke of Wellington in the Peninsular War, had a second term as Envoy Extraordinary and Minister Plenipotentiary to Portugal and Brazil in 1825-26. The King appoints Stuart and Chamberlain as “Our undoubted Commissioners, Procurators and Plenipotentiaries”. Stuart was already Envoy to Brazil for King John VI of Portugal and has signed the Treaty recognising the independence of Brazil on 19 August 1825. George Canning (1770-1827), Prime Minister from April 1827, signs as Secretary of State for Foreign Affairs.