Who is Madeline Ross from the novel, The Copper Beech?

Madeline Ross is one of the teachers at the Shancarrig school. She lives a lonely life with her mother, but she finds a friend in the new priest, Father Barry. The two become close friends, and then Maddy falls in love with Father Barry. When Father Gunn suspects that the two of them are having, or are about to have, an affair, Father Barry is sent to do missionary work in Peru. Maddy is faithful to Father Barry in his absence, but he falls in love with another woman.