My GG grandmother Margaret (aka Marguerite) O'CALLAGHAN was born 1832 in Mallow, Co.Cork. She married James HARVEY 6 Sept 1852 in Adelaide SA, Australia. Her father was Owen O'CALLAGHAN, her mother's Christian name I'm led to believe was Honora. This is as far back as I have been able to get with this family. Can anyone help please? Thanks, Helen - Qld, Australia