As far as I know Andrew Rankmore and Mary Jane met in Austrlia, and stayed here, though it might be possible that they were in another state when they got married. It's also possible that they were never married, and lived in a de facto relationship. It would just help so much if I could find out Mary Jane's maiden name.
Charles Rankmore might have been born after 1905 (when the bmd indexes end).
thanks,
Sara