I've been going over some of Butterfly McQueen's appearances on the show recently, and I'm starting to get a feeling of why there's a story that she walked off saying that she didn't want to play "Prissy" (her character in Gone With the Wind) any more.
As opposed to Rochester who always gets the best of Jack, Butterfly is very much a silly, simpleton character. Mary dictates a dinner menu to her, and she says she's having trouble with the spelling. "What are you having trouble with?" asks Mary. "The words," says Butterfly (listen to her delivery on that...call me crazy, but I think she disliked that line).
Later Butterfly borrows Mary's bottle of liquid stockings: "How much do you have to drink before they go to your legs?"
Having just finished Elizabeth McLeod's MAGNIFICENT book on "The Original Amos n Andy" (look for it on Amazon.com...it's definitely a MUST READ), I have been immersed in discussion of the issues around the portrayal of African American characters on radio of this time. And Butterfly's character definitely falls into the minstrelsy of another era (although she's not really in dialect), an unflattering portrait of a rather dimwitted servant.
I find this very surprising, since the writers were already coming around with Rochester's character by then, lifting him out of the razor-fighting and crap-shooting 30s to the smart, one-upsman that we all remember. Perhaps they couldn't have Butterfly be smarter than Mary, since Mary was always harassing Jack in one way or another and was seldom herself the butt of jokes. And in fact when Mary got Pauline, her subsequent maid, Pauline is also a silly character who rambles verbally.
I'd be interested to hear other thoughts on this.