Ann GABB born 1840, Richlands (I think this would be a locality near Crookwell NSW), married 1858 NSW, and was a mother by 1860, sadly two infants succumbed before Hester JORDAN was born 8 August 1864.
May I ask about that marriage registration ...
What denomination, which clergyman, and what is the relationship recorded on that record for the person noted as giving permission for a minor to marry. Also what names of the witnesses - perhaps a deep background search for them may help. It may well be that there are some blanks on the m.c. - not at all unusual for the era, but assuming the celebrant was a clergyman, then his parish register should have all the elusive details about the bride, the groom, their respective parents... Always useful info to use to confirm/validate the known knowns.

JM