I don't know much about James Erskine's birth and what I have comes from other people, no records to back it up. Naturalization records show he was a native of County Antrim and arrived at Charleston, SC in 1789. Family Search shows their first child being born in Charleston in 1790 and the others in Pendleton District, SC. His will is available online at the SC Archives site. I know this probably isn't much help. Good luck on your search.