Heather, I am finding it a little difficult to follow some of your posts.
In one post you say your great grandmother was Margaret Mary Ann McKimmie, and in another post you say that she was Margaret Mary Ann McKenzie.
Then you say that she was born in 1863, then that she married in 1866. Obviously someone born in 1863 could not have married in 1866, so who was it who was born in 1863, and who was it who married in 1866?
Also, the SP index has no marriage of a Mar* M*k*ie to a W* St*art in 1866. Did you mean 1886?
And who was the Annie McKenzie who you say emigrated to America?