Mr. John P. Birchall is a great enthusiast and educator in the field of traditional jazz. I have never met John but I became aware of him through the internet. I have exchanged emails and materials with John and he has always helped me with great kindness and generosity.
I want to tell you that John has - on his website - a mass of thoughtful, well-structured information that is intended to help anyone who is trying to play the music and perhaps finding it difficult to get to grips with the structures of harmonic progressions and with improvising.
For access to this wonderful resource (for which many thanks, John):
CLICK HERE.