Charles Daniel Lucas, Sr.

Looking for info on CDL, Senior - born in 1747 - Prince George Maryland - died abt 1805, Marlboro County, SC.Married to "Dorcas" - no maiden name given nor any other family history in regards to her parents.I have read that they owned land in the PeeDee River area.He married "Dorcas" in 1968-1770 time frame.She was very young...13 years old. Had two children that I know of...William and Charles Daniel Jr. (my great great great great grandfather).
Would love to know more about him, what he did for a living, who is "Dorcas".Was she Native American (PeeDee Indian)?
Any information would be appreciated.