What a treasure trove of information! I accessed all the sites you referenced and captured pictures of pertinent data that I will collate and examine.
Thaddée & Genevieve Bastarache were the grandparents of my grandmother Celeste (Bastarache) Boucher, daughter of Nicholas Bastarache. Until I received the data you provided that's as far back as I had been able to go.
I owe you a great debt of gratitude — many thanks!