DS, one page, 8.5 x 11, July 8, 1948. A letter to Samuel Goldwyn Productions, which reads, in part: 'In connection with your photoplay, 'A Song Is Born,' I hereby authorize you to simulate my trumpet playing in connection therewith on those transcriptions for station breaks and spot announcements where my name is used.' Boldly signed 'Louis Armstrong' in black ink at the conclusion. In fine condition, with usual file holes to top. RRAuction COA.