It is essentially a typical 12-bar of the 1920s. It's easy to pick up if you would care to add it to your band's repertoire and the words are very clear in that original Columbia recording.
In August 2014 - I was told by a reader - Barnabus was still be to heard singing this song with the band when it was on tour in the state of Maine.
I have had a request from a reader for a leadsheet for this tune. Here's an attempt, which I hope is better than nothing: