SARAH CLARK Orange Co. North Carolina

I'm looking for info on a Sarah (Surname believed to be CLARK). The only info I have on her is that she was born in 1748 in Hillsboro, Orange Co., North Carolina.

Sarah married Edmund Gilham in Orange Co., NC about 1770. They both had a child named Elizabeth Gilham (Gillum) born October, 4, 1780 in Wilmington, Highland, Ohio. or Virginia? or North Carolina?

I'd like to find out more about Sarah and who her parents were, and the definite birthplace of her daughter Elizabeth Gilham.

Thanks.