I am looking for the baptism and marriage records for

Jean Marie Marche, b. circa 1800 in Bras d'Or, Cape Breton, N.S., son of Jean-Joseph Marche and Theotiste Marie Babin. He married Mary Martha Lejeune circa 1826. She was born circa 1802 in Bras d'Or and daughter of Jacques(James Young)Lejeune and Catherine Jesseau in Little Bras d'Or, N.S. They moved to the Port au Port Peninsula in Newfoundland from Bras d'Or.

I am also looking for info on their daughter Nathalie Sarah Marche, born about 1824 and married Louis Laisne, August 24, 1851 at Sandy Point. I cannot finf her baptism record. They are parents of my great great grandmother.

Any help or hints would be greatly appreciated.