This is from the second episode of the NBC radio show The Circle, broadcast on January 22, 1939. NBC assembled a top-drawer cast — Grant, Ronald Colman, Madeline Carroll, Carole Lombard, and Groucho and Chico Marx — and put together a show in a round-table format, where all the stars were members of some sort of club. Much to everyone’s surprise, the show almost immediately flopped, only lasting a few months.
Click this: http://www.dinosaurgardens.com/archives/175
and then listen to it.