Hi kinky d
... thanks for your post with updates ... and for clearing up the confusion.

As I said earlier, the electoral rolls are not always accurate - sometimes people did not notify that they were moving elsewhere in the country ... and some just stopped registering to vote for whatever reason. And there are those (especially women) who wished to change their identity if they were say, living in a new relationship.
It may be that Vulenza had moved away from Masterton before 1908

William certainly had, because there's evidence of him being in Auckland from 1907 at least (and he's not in a position then to provide for his wife.)
* Were any of Vulenza's other children in Auckland from 1905-06 ?? Eliza DICK and husband are in Taranaki (1911) then Waikato (1919-1922 e/rolls) and by 1925 living in Auckland.
It does not seem from NZ records that Vulenza has died here (NZ) before that
possible sighting on the passenger list in 1917 to Sydney. So we have to keep on trying to locate her in Australia.
* As well as Claude O'HAGAN, do you think there could be other grandchildren of Vulenza who could have gone to Australia (even for a short time) ??Vulenza is aged 66-67 years, in 1917. That was considered very old in those days. If she was off to Australia to live, she would undoubtedly need the support of others - friends/family ?
Also, 1917 was during WW1 -- lots of restrictions going on -- who would have paid her expenses, her fare to Sydney etc ?? Seems odd too that she might have been using the surname BOOTH if she was "escaping" New Zealand for any reason ??
I've also tried searching for her using her second given name of "Mary". (No luck with that so far).
~ Lu