I first heard the song from the Serendipity singers on one of their albums in the 60's. The lyrics are pretty close to what they had.

I also ran across a 30's or 40's version that had a different melody and some different lyrics, but obviously the same song.

Maybe it was on a Django Reinhardt and Stephan Grappelli tape I have, but I'm not sure.

Best bet to get the song is on the Serendipity singers album. I also saw an album by another singer that had it on when I searched on"Preacher and the Bear" on Metacrawler. I'm trying to get the lyrics myself...great song!