Thanks Stewie and 12-stringer fro your detailed and accurate replies.
Here's the link to Bow Wow Blues composed by Cliff Friend and Nat Osborne which is a different song:
The chorus has a nice ragtime progression.
I'm sure there were some newspaper articles in 1927 about the Allen Brothers lawsuit. Maybe some has a newspaper search membership.
I'll try to find the Wolfe and Nelson interviews. If anyone has any other info please add it.
I'm curious about the Allen Brothers playing with fiddling legend Bob Douglas playing on the Allen's Victor recordings in 1928. Maybe there's more info on thai event somewhere. Anyone?