This is as far as I can get in my family tree thus far. Mary BURTLE was my 4th great-grandmother. She was born in St. Marys, MD on February 14th, 1789, and died on June 29, 1866 in Pike County, Indiana. She married David CORN, who was born in Washington, KY in 1791. Her parents are listed as Benjamin and Catherine BURTLE. Benjamin BURTLE was born abt. 1773 and died bef. 1789 in St. Marys, MD. Catherine was born abt. 1775. Any information pertaining to these people, their ancestors, or their ethnic backgrounds would be greatly appreciated.