ALS, signed “Diana,” one page both sides, 6.25 x 8, Kensington Palace letterhead, February 5, 1991. Heartfelt letter to Mrs. Brenda Duffy, son of RAF pilot Kieran James Duffy, the first Tornado pilot to be killed in the Gulf War. In full, “When I visited R. A. F. Brüggen last week, it was very obvious to me how brave & exceptional Tornado Pilots were & how your son Kieran was a member of a unique team. I can only imagine what you must be going through & words seem totally inadequate at times like this. However, I did so want for you to know how deeply I feel for you & that my thoughts & prayers are with you & your family. I will of course see what I can do about the Memorial Fund & thank you for bringing it to my attention.” Accompanied by the original mailing envelope, addressed in Diana’s hand, with Diana adding “D.” to the lower left corner. In very fine condition, with a bisecting horizontal mailing fold. COA John Reznikoff/PSA/DNA and R&R COA.