My dad's aunt had compiled a great deal of info in the late 70'searly 80's. Her info goes all the way back to John Black. She had DOBDeath Date of all except David Black and John Black. She had that David died 1769 Augusta CO VA and that John died 1758 Augusta CO VA. I found on Ancenstory.com under McCormack Family Tree, all the info that my dad's aunt had and the DOBsand Death Dates matched perfectly. I have to assume that it's correct. I just know that everyone's info can be a little different and that there were several John Blacks.