Elizabeth Kemp Samuel Burgess

I now know that all three of Elizabeth Kemp's children were born in NZ, I cannot find a marriage certificate at all, but her death cert states that she was married to Samuel Burgess in Taranaki around 1880. Elizabeth Kemp died in Australia in 1886 of consumption and her child Elizabeth died in 1889 of Typhoid also in Australia. The birth certs for all three children name the mother, but not the father and are all registered as KEMP