Leigh Bonheur was once a 'human hand-me-down'. As an illegitimate child growing up in Sydney she was abused by a succession of foster and adoptive parents. Now in her 60s, she tells Marian Foster about her life in Australia and how she overcame her problems to become a novelist and journalist - successfully campaigning for the rights of the abused child. Producer ANNE-MARIE COLE BBC Pebble Mill