Hi Bernice
There are quite a number of "trees" at ancestry re: Charles BAKER (1821-1917) and Martha Maria VERCOE (1833- 1915) - said to have married 1852 in Taranaki.
None of those I've looked at make a lot of sense to me - because they
only name two daughters of the couple > Annie , born at Sydney
1854 and Janet, born NZ
1855.
That's it ... they don't tell who the daughters married etc.

... so it's puzzling why the parents' names even feature in the "trees".

Martha was apparently born about
1833 ... so it's really not possible for
her to have been the parent of Jane (- whose parents were said to have arrived in NZ per "Westminster" c. 1841. )
[Think I also mentioned earlier that I could not find BAKER listed on that voyage to NZ. ]
* I think you are going to need the 1882 NZ Marriage printout for Jane BAKER - James ELLERY, to learn who exactly Jane's parents were.

~ Lu