Hello Cathy -
I have run into a hard brick wall with the Alexander family, and this is my direct line. I have Mary's birth (state only as MS) and death (detailed), and where married (detailed). Also have a note that she had had a brother John Alexander born in the same decade as she (1800-1810).
But, unfortunately, that is it. I would love to glean any information that you may have on this family. Scotty