Standard 8.5x11" business letter is dated March 22, 1943, and is signed by Commissioner Kenesaw Mountain Landis. The letter is typewritten on stationery with the simple header, "BASEBALL" and was sent to Brooklyn Dodgers' catcher Billy Sullivan, with a Cc to Ford Frick. Contents seem pretty standard as relates to Sullivan's "Voluntary Retirement" and the rules for reinstatement, should he decide to do so. A deeper dive reveals that the retirement - affirmed by this letter just weeks before the start of the 1943 season - actually appears to be in deference to his service in World War II, which carried through the 1945 season. In fact, Sullivan did return for one final season in 1947 with the Pittsburgh Pirates. Landis' signature in black fountain ink is 6-7/10, letter has typical mailing folds, and there are a couple of very small stains though it has been extremely well-preserved. Comes with JSA LOA for Landis signature.