In the very early 1960's there was a wonderful blues musician up in Portland named Mike Russo. There are a couple mentions on Mudcat, but I have forgotten how to find and copy links. I finally located him 4-5 years ago; he had reminscences of playing with Sonny Terry and Brownie McGhee. Very unassuming guy with no ambition except to play music, and he no longer plays in public. He made a recording for Arhoolie which is well worth hearing, particularly piano blues. He also played 12-string guitar after Lead Belly--very well, but not so good as the original.