One remaining mystery is over the identity of "Bud" in the photo below. Clearly it is Jim Holstein on the left but who is "Bud" ?

It had been thought that it was probably an older Bob Pauole who has by this time gained a few pounds . However the age of the sheet music and the later photos of Bob which we now have show that this cannot really  be the case. Photos provided by author and researcher John Troutman of Bob when he was in his  40s reveal a man little changed from the earlier pictures of him and not a man who has aged significantly and put on weight.

Many thanks to Scott Thomas for sharing the above sheet music with us. Scott also reminded us that  the 1930 National catalog refers to the Jim and Bud duo