King George III document signed, written to Napoleon's brother Jose I, King of Spain. Signed ''George R'' to the upper left of the first page in giant script. Datelined within the text: ''Given at Our Royal Castle at Windsor'' 4 January 1810, document appoints Charles Richard Vaughan, Esq. as Secretary to the British Embassy in Spain. A seal bearing George's name is affixed to the left. Countersigned ''Wellesley'' by Richard Colley, Marquis. Five pages, beautifully bound with a black silk ribbon. Measures 8'' x 12.5''. Minimal creasing, else near fine.