Wow.....thanks a zillion for your effort......the key is Eb apparently.....is that to facilitate the wind and brass instruments?.....I suppose this must be Eddie Lang's chord choices.....I will let you know my success at learning this arrangement....I love to play Emmett Miller's version of "Lonesome Hearted Blues" which has an a complicated chord pattern with a key modulation as well, but it is in a more conventional guitar key (Dmaj and F sharp maj).....it is played rather loosely but I suppose that could be the dixieland influence where group improvisation created such realities.....thanks again grishka, you must have an amazing ear!