By the way, I don't believe that, about blues musicians not being able to read music

I'd say some could, some couldn't. Some were completely illiterate. Didn't stop them making beautiful music though.

Also just because you don't read music, doesn't mean you don't know any theory.

And a high action is ideal for slide. Go for it Maeve!

And now for some John Lee Hooker (illiterate): Boogie Chillen

Pete