Searching for Information on Margaret Mcdonald Who Married John Charles

Searching for information on Margaret McDonald who married John Charles Dudley Marsh in Jindera NSW in Sept 1899. They lived in the West Wyalong area. John divorced Margaret in 1914 as she had an affair with a William Foster (formerley of Longreach Queensland). It is believed that she travelled to Queensland from letters found. No trace is found of her after this time. She was born in Eldorado Vict in 1878. Her parents were Hector McDonald and Mary Barry. Any information would be greatfully appreciated.