Tara, good findings!!
Hi Kate, 1906 electoral rolls for South Fremantle Attfield St has
Owen private means & Thomas stock keeper.
1903 same address Owen is a gentleman, Annie home duties & Thomas a stock keeper.
Tinam
added I've found the 3 of them in 1910 census. Owen a pensioner & Thomas retired.
William Henry Mansbridge is in 1910 census also but his wife is Mary, Balcatta Perth.
Perhaps he is Margaret's father in law? There is a death in 1914 and he's 80 yrs of age.