Looking for William Hills

Dont know much about WILLIAM except he was born on 21-9-1817 & died on 18-6-1892 He married MARY ANN ALPAN on 10-9-1839 at St Johns Church Launceston Tasmania Australia They had 11 children all born in Tasmania
Dont know where they died --cant find a record of their deaths in Tasmania but my daughter has their marriage certificate so we know these facts are correct