Hi Marion
I was a wee bit excited by your reply because I have a Sarah McKinnon a sister of Catherine...

sadly Sarah (Marion) wasn't born until abt 1838 so she is not (at the moment) a link.
However with respect to your own research, I HATE brickwalls, what I have discovered is it looks as though your Sarah McKinnon died before 1850, Daniel in fact had 4 wives in his life-time

he did father a further 3 children, 2 girls (3 marriage ??) and a boy (4th Marriage ??) before his death, however I don't know for sure if Elizabeth was his only child with Sarah, what I do know is that Daniel's mother was called Elizabeth so that follows on with traditional family naming and his father was called John (Perhaps there was another child John

I can't be sure as it was all before statutory registration
I do have Daniel's death Registration, marriages of all his wives and some Census Records of which I am sure you would like....just let me know and I can let you know the details...
Sorry that I couldn't find a concrete link with my Sarah (Marion) and yours....

.....however I would be happy to find out how you get along with your research and if the info I have has helped in any way!

Kindest regards
Melanie