Marhi Jessica Beatrice Curran

Who I am the daughter of. My mother born in Austrailia 25 January 1945. Living in malaysia for some years with family, father was a planter called Clieve, and mother Georgina, both separated in late 50,s. I am desperate to find her as well as her sister Angie, myself and brother have lost contact for so many years please please can anyone help.