Hi Derek,
Annie WEVVER, has been married for 23 years and has two children. So they would be less than 23 years old, in 1911.
I went to the website:
http://prov.vic.gov.au/index_search?searchid=42Surname: we*ver
Year 1909 to 1911
Index to Outward Passengers to Interstate, UK, NZ and Foreign Ports.
WEAVER —- MRS (Age) 50 ORVIETO MAY 1910 LONDON VIA PORTS MAY 1910
WEAVER —- MISS (Age) 21 ORVIETO MAY 1910 LONDON VIA PORTS MAY 1910
Mary
EDIT... "has been married for 23 years and has two children"
Should be.... "has been married for 23 years and has one child"