Curtin University researchers are set to collate letters from state archives and correspondence held by families across Western Australia, dating from the 1860s to the 1960s.

Working alongside Noongar advisers, they plan to present the letters together with stories and oral histories by the authors' descendants.

"They add to history Noongar voices that have been lost in historical time, but voices that people in families remember," Curtin University research professor Anna Haebich said.