I need a second opinion on something..
OK - so, it's been some time since I did research on this side of the family. When I took a break from this family, I struggled to find Mary in the census or anywhere else in the period between her birth and her marriage in 1880. She wasn't listed with her mother and her new family in the census in 1861 and 1871. (For those who hasn't read the whole story - Mary was illegitimate and didn't live with her mother it appears. Her father is nowhere to be found.)
And now - when I opened the birth certificate of the Mary MacCallum (Buchanan at birth), I noticed that the witness that signed is given as John Carmichael - Uncle.
So, I thought I'd look for this John Carmichael in the census, and when I found one possible match from 1861, it turns out that there is one Mary McCallon living with them. His niece. Could this be the Mary I'm looking for? I'm really just asking for a second opinion, since I myself think it's reaching a bit. But it does match up pretty well. This Mary living with the Carmichaels is born in 1856. Mine in 1855. The family is living somewhere called Balenlan, Lismore. Mary's place of birth is given as something that looks like Balevolan, Lismore in her birth certificate.
And then, in 1871 John's wife name is given as Mary Buchanan. (Mary McCallon isn't living with them in 1871.)