Just a further thought. Looking at the tombstone of Frances Hamilton I see it has the name of Moss on. Did members of the family do that, as do you think they knew about her previous marriage. See I misspelt Frances’s surname in my last message. Thank you for the wills have had not had time to read.
Hi lin-james
Are you referring here to the photo of headstone for Frances HAMILTON which appears on the FindaGrave website ??
If that is the case, then just a word of caution.

The listings/ and photos on that site, are added there by random (- awful word - because these people do a wonderful job in photographing cemeteries

) persons, who are not even necessarily related but source information from public records, published family trees, etc. etc. to provide "extra" details to accompany their photos.
Helpful, but all details should be verified by checking actual records if available.
In the case of Frances, it would seem that the "name of MOSS" has quite probably, simply been sourced from the NZ Marriage Index ?
The text isn't actually visible in that photo but I do recall seeing the inscription (at another site) ... quite sure it didn't mention MOSS. I'll dig it out and post a transcription of same for you.
~ Lu