I read that you are researching the Poston's out of North Carolina.I am also researching the Poston's in Southeast Missouri.Perhaps, we can research this line together. Have you reviewed any probate information? Do you know who "owned" Arthur Poston? This may give add'l info on his siblings and other family members.The Poston's originated in Maryland, became surveyors moving through the Carolinas, Tennessee, Louisiana and Missouri. Transporting and probably purchasing slaves along the way. Let me know what info you have or are looking for?