This is lineage does not appear to be correct. There are many James, John, and Robert Blackwell persons, and you have this Sandy Elizabeth Price as being born circa 1734, yet being the mother of John Blackwell b. 1735. This is all messed up.
The website http://www.jamestowne.org/revolutionary-war-era-people.html has these Blackwells listed with their dates and spouses:
Blackwell, James (1731 - ca 1822) married Temperance Pope ( bef 1756 - 1840) – QA Raleigh Croshaw A2008
Blackwell, James (1752-1836) married Elizabeth Price (1753-bef 1810) John Price A6408
Blackwell, John (ca 1730 - ca 1782) married Mary Catherine Richardson ( - 1779) – QA Raleigh Croshaw A2008
Adjustments need to be made. I believe my family tree had/has the correct persons in lineage.
David White