The Betty Corum and Sam McMullin Family Tree, Applegate, OR

I am currently researching the McMullin Clan.I have gone back to decendent named, AMERICA MCMULLIN, and his father, WILLIAM MCMULLIN.Please share with me any Geneology with these names.This would be before 1870.They maybe from the old country..
My CORUM geneology goes back to HIRIAM CORUM who died in 1793.
But ON his father JOHN CORUM, I have no dates just that he married Mary Cobb.Please share with me what you have and I
will be delighted to share any information that I have Thank you
And God's Speed.Gratefully,Betty McMullin