So you are seriously suggesting that the people you list above could have been heard in New Orleans in 1911 ????

I have been listening to this music for over fifty years and didn't realise that I needed you to come along and tell me what I was listening to.
I am sure that all my friends will be unloading their libraries on E-Bay now that we have your expertise on line.

When did you write the rules of what is and isn't blues and how it should be played? Just think how much more successful Muddy Waters, John Lee Hooker etc would have been if you had been there to explain it all.