The often venerated Christie's auction house is currently running their "Golden Age of Baseball" auction, and it includes numerous historical artifacts; including this fantastic vintage original letter featured here.
Dated February 9th, 1930, Dodger manager Wilbert "Uncle Robbie" Robinson writes to friend and ex-Dodger Max Carey. (auction link)
As you may know, future Hall of Famer Max Carey had just retired from the game after having spent 17 years with the Pirates and the past four seasons in Brooklyn. So now he was looking towards life after playing, and naturally wanted to stay in the game.