Hi and welcome to Rootschat.
It is great to be in contact with a McMillan relative

How are you connected to Robert Shaw McMillan and how far back have you got with his family
I know he was married to Agnes Harley and that his parents were Robert McMillan 1818-1882 and Jane/Janet Hamilton 1819-1889, both born and married in Belfast, Antrim, Ireland. I believe Robert's father was James McMillan, but that is about as far as I can get - Irish records for this period don't seem to be available.
Do you know when Robert Shaw and wife Agnes died, as I have drawn a blank there as well

Joan