TLS, one page, 7.25 x 10.5, personal letterhead, October 18, 1971. Letter to an admirer. In part: “With reference to your inquiry about the most exciting moment in my aviation career; frankly, it would be difficult to choose any one particular event as each one was the most exciting in its special way.” In fine condition, with a horizontal fold through bottom of signature. Accompanied by the original mailing envelope. RRAuction COA.