Thanks Geoff.
That took us to 1917.
1925 WA Electoral Roll - Fremantle - South Fremantle
BLACKMAN Leonard Douglas, rear 114 South street, labourer
BLACKMAN Gwendoline Mabel, rear 114 South street, home duties
The West Australian (Perth, WA : 1879 - 1954) - Monday 26 October 1931 p.1
DEATHS
BLACKMAN (nee Harris).-On October 16, 1931, at Cottesloe Beach, Gwendawlyn, dearly beloved wife of the late Leonard Blackman, loving mother of little Doreen, and sister of Jack, Fremantle; Arthur and Norman, Dudinin; Mather [Martha], New Zealand; Gertie, Holycake; Jim, Wubin; and Herbie, New South Wales. Aged 39 years. Privately interred Karrakatta on October 19.
Dave