ELIZABETH II, Queen of England (b. 1926). Autograph letter signed ("Elizabeth"), as Princess, to Colonel Goullrem(?). London, 13 May 1948. 2 pages, 8vo, on recto and verso, on Buckingham Palace stationery, soiled with a few pale stains, creased at folds with slight separations. Declining an invitation to lunch with the officers while attending a review of the 3rd Battalion at Windsor citing a prior engagement: "I have just learned that the King wishes me to attend a meeting on the afternoon which means that I shall be unable to stay to lunch at Windsor I'm afraid I must be back in London for lunch.."