TLS, one page, 7.25 x 9.5, FBI letterhead, October 1, 1937. Letter to MGM executive Eddie Mannix. In part: “I wanted you to know how very sorry I am that it was not possible for me to return to Metro-Goldwyn-Mayer Studios…If at any time you are in Washington…you have a most cordial invitation to visit the Federal Bureau of Investigation.” In fine condition. RR Auction COA.