My great great grandfather, Abraham Marcia, sprang full blown from the head of Zeus in the 1850 Ralls County, Missouri census as a laborer in the household of Thomas H. and Nancy Graham. Later that year, he married Nancy Hawkins, the daughter of John Franklin Hawkins, who was a prosperous landowner in the area. Other than Abraham's birth date (12 October 1828), I have been unable to locate any other information about his antecedents. I have information that his name probably was Abraham Mercier, but that does not help me in finding out anything else about him.
I live in Texas, so I am limited to online resources and the kindness of others at the moment.
Thanks.