This is fantastic.
Featured above is an letter from former Brooklyn Dodger pregame television host Happy Felton to LA Dodgers owner Walter O'Malley in 1958. It is currently for sale in the Lelands 2015 Winter Auction (auction link here). In it he writes about recently taping an interview with Roy Campanella, who was paralyzed by this time, and how he was doing his best to help Campy earn a little bit more income. Furthermore, Felton spread some good news that Roy was physically improving just a bit.
As you know, the Dodgers eventually put together an fund raising event for Campanella at the LA Coliseum that drew 93,103 fans (a record for a game at the time) in May of 1959 that raised a whole bunch of dough.