Nick, if you know Harry's Basile Waltz, compare it with Valse a 'Tit Maurice! Aldus did it ('Tit Maurice). Terry Clement did it first. Check my Web site for Clement Brothers' version.
About Harry Choates, there is a bio about him in "Accordions, Fiddles, Two-Steps, and Swing" by Ryan Brasseaux and Kevin Fontenot (editors). This book highlights the careers of many Cajun musicians and as Big Nick mentioned, Harry Choates lived hard and died young...too bad because he was such a talent. Harry Choates is cited by Hadley Castille (and others) as being a huge influence. If you get the chance, ask Mr. Hadley about Harry Choates because I think that he has some good stories about him.