Sarah Christina McKENZIE , –
Residing with a Reginald Jeffress at this time. Her husband Arthur is not included.
This is pure conjecture. I have found the following births in the NSW Births Index. May be that Sarah's other name was Christina and that these were the births of hers and Arthur's children.
22609/1905 JEFFRESS IRENE E A ARTHUR E CHRISTINA DRUMMOYNE, and
21623/1907 JEFFRESS MONA R ARTHUR E CHRISTINA BALMAIN SOUTH