"Mo Mary" appears on Belafonte's '"Mark Twain" and Other Folk Favorites', RCA LPM 1022. The album dates to 1954 [I can't believe I bought it all those years ago] and is long out of print.

But I have a worn duplicate copy, playable but not great. That cut is good. If you have a phonograph or turntable, I can be persuaded to let it go cheap.---John