b. perhaps Mississippi, USA. An obscure harmonica participant and vocalist, Alfred Harris (aka Blues Ruler Harris or Johnny Harris) documented on three different events in the 50s, every time under a different name. The initial, in 1950 or 1951, was throughout a field trip with the Bihari Brothers, in Mississippi, Arkansas or Tennessee, and highlighted Harris with another guitarist, playing acoustic, in an exceedingly down-home style. A couple of years later there is a program in Chicago, with Adam Bannister and Earl Dranes, in a far more electric, urban design. Neither of the two classes was released until a long time later. Finally, there is an individual, also documented in Chicago, in 1956.