Mmm ... yes, this is a very sad saga indeed.

Of course there is a great deal written about the case in PapersPast (which takes a good amount of reading through) so perhaps you could expand a little on the details you already have ... or provide some clarification ?

* Firstly ... do you have Sarah Jane's year of birth ?
[I note in one article, she's described as being about 30 years of age (in 1891). There's a birth (NZ) in 1871 of a "Sarah Jane FLANAGAN" ... might that be her ? That though would make her only 20 years old in 1891 ?]
From Papers Past I know Anna the mother was pardoned about 1895. They originally were both sentenced to death but this was commuted to life.
* Do you have the actual reference regarding this pardon ?
[Was the mother in Christchurch at this time ? It seems that Sarah Jane was being held at the Terrace Prison, Wellington in 1902.]
Unfortunately Sarah Jane Flanagan(maybe married Stevens, Stephens)
* The newspaper reports seem to suggest that "Mrs STEVENS" was an alias used by Sarah Jane ? Have you got any further information to show that she was married ?
[Noting that the child's death - 5 January 1891 - was registered under "FLANAGAN". ]
Lu