TLS as President signed “RN,” one page, 6.75 x 8.75, White House letterhead, May 20, 1971. Nixon writes to Joseph Kaplan in the Department of Physics at UCLA. In full: “You are undoubtedly aware through Bob Finch and Dr. Edward David that we have been looking into the various suggestions that you have raised, and this is just a note to thank you for your letter of May 17. As you requested, I am sending a copy to Dr. David, who will surely be pleased as I was to have your comments and recommendations….” In very fine condition. JSA/John Reznikoff Auction LOA and RRAuction COA.