Do you find them in 1881 USA census or in 1881 canadian census??
If you can tell me where Joseph Antoine lived in those years. What name id he useBessette or Basset or ??? I can try to find more info. His wife's name? Do you think than Clemence was dead before that? Do you know where in Quebec or other province of Canada they are from?
I will try to find something for you, but all little piece can help.