I am looking for proof(source) for Pierre Gautreau born about 1840 probably in Memramcook. He married Marie Poirier at Grand Digue, 30 Jan. 1871. I have his father as Simon Gautreau(b.1798), married to Marguerite Cormier, 28 Jan. 1828. I need proof that Pierre was the son of Simon. Can anyone help.